Data Graphs

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Graphs are beneficial because they summarize and display information in a manner that is easy for most people to comprehend. Graphs are used in many academic disciplines, including math, hard sciences and social sciences. They make appearances in corporate settings, serving as useful tools to convey financial information and facilitate data analysis.

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  • Why are graphs important?

    Q: Why are graphs important?

    A: Graphs are beneficial because they summarize and display information in a manner that is easy for most people to comprehend. Graphs are used in many academic disciplines, including math, hard sciences and social sciences. They make appearances in corporate settings, serving as useful tools to convey financial information and facilitate data analysis.
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  • Why are points connected in a line graph but not in a bar graph?

    Q: Why are points connected in a line graph but not in a bar graph?

    A: A line graph is a graph that charts the relationship between two variables or a progression of a single quantity through time. Without the lines connecting points of data, it would be difficult to make sense of the data being presented if there was no overall trend between the dots. A bar graph, on the other hand, is meant to compare two or more statistics, such as population figures.
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  • How is data turned into information?

    Q: How is data turned into information?

    A: According to the BBC, data is transformed into information after being imported into a database or spreadsheet. Information is defined as a collection of facts or data, whereas data is defined as information organized for analysis or used to reason.
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  • How does a graph help people interpret scientific data?

    Q: How does a graph help people interpret scientific data?

    A: Graphs of various types provide convenient visual representations of scientific data that would otherwise be presented in intimidating blocks of text or a series of numbers. Graphs represent statistics such as changes over time, comparisons, or parts of a whole. Graphs can be used to make date more accessible to both scientists and laypersons.
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  • When do you use a bar graph?

    Q: When do you use a bar graph?

    A: A bar graph is used to compare items between different groups and track changes over a period of time. Bar graphs are best used for changes that happen over a large amount of time instead of just months or weeks.
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  • What is a pie graph used for?

    Q: What is a pie graph used for?

    A: A pie graph is an effective visual tool used for showing how something breaks into parts. A pie graph is essentially a circle sliced into 100 pieces. Each category or part represented in the pie graph is given a piece of the pie to represent the percentage that it comprises of the whole.
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  • What is numerical data?

    Q: What is numerical data?

    A: Numerical data is data that is expressed with digits as opposed to letters or words. For example, the weight of a desk or the height of a building is numerical data.
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  • What are the names of graphs?

    Q: What are the names of graphs?

    A: Several types of graphs are used for displaying information in mathematics including the bar graph; pie chart or circle graph; histogram; stem and leaf plot; dot plot; scatter plot; and time-series graphs. The type of graph chosen depends on whether the data is quantitative, qualitative or paired.
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  • What is a segmented bar graph?

    Q: What is a segmented bar graph?

    A: A segmented bar graph is similar to regular bar graph except the bars are made of different segments that are represented visually through colored sections. A segmented bar graph is sometimes known as a stacked bar graph, and it offers greater detail about data sets.
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  • What are the advantages and disadvantages of a graph?

    Q: What are the advantages and disadvantages of a graph?

    A: The primary advantage of using a graph or chart in a presentation is that they help the audience to visualize the point of the presentation. Graphs emphasize the main point, make the data more convincing, provide a compact way of presenting information and help audiences stay engaged. Disadvantages of graphs include being time consuming to construct and costly to produce. They also require technology that some may lack.
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  • Who invented linear equations?

    Q: Who invented linear equations?

    A: Linear equations were invented in 1843 by Irish mathematician Sir William Rowan Hamilton. He was born in 1805 and died in 1865. Through his algebraic theory, Sir Hamilton made important contributions to mathematics, and his work found applications in quantum mechanics.
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  • Q: What is a hyperbola grapher?

    A: A hyperbola grapher is an online resource or calculator that graphs the hyperbola from the given function. Online hyperbola graphers allow students to enter the values of x, y, a and b to generate the graph. Students do not have to graph the hyperbola themselves.
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  • Q: What is a percentage component bar chart?

    A: A percentage component bar chart shows what the percentage that multiple components reached to make 100 percent of a given value. The bars can be stacked horizontally or vertically depending on the type of look someone wants to give their graph.
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  • What is a horizontal bar graph?

    Q: What is a horizontal bar graph?

    A: A horizontal bar graph is a visual representation of data that include a series of horizontal bars representing numerical amounts. Variations in the lengths of the bars allows for quick comparisons.
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  • Q: How do you graph an equation?

    A: To graph a math equation, acquire some graphing paper, draw x and y axes, and decide whether the equation is linear or non-linear. Approach the problem by finding the slope of the linear equation or using a table for a non-linear one.
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  • How does a grading curve work?

    Q: How does a grading curve work?

    A: The purpose of a grading curve is to establish criteria for determining letter grades in an academic environment. Regardless of actual test scores, a few students receive high grades and the remaining students receive average to below-average grades.
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  • Q: How do you find a z-score?

    A: To find the standard score, or "z-score," first determine the score, mean and standard deviation of the set. The z-score is calculated using the formula "z = (x - u) / o," where x is the recorded score, u is the mean score and o represents the standard deviation.
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  • Q: What is a coordinate grid?

    A: A coordinate grid is a series of vertical and horizontal lines that form a pattern of squares on the page; each grid line has a number or coordinate. Coordinate grids are useful for graphing positions of numbers to see patterns of lines and curves.
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  • Q: What are some of the advantages and disadvantages of a Gantt chart?

    A: The main advantage of a Gantt chart is that it makes it easy to understand the steps required to complete a project, thus enhancing organization and improving the chances of success. Its major pitfall is its potential to become overly complex; if the project is big, the Gantt chart can become large and difficult to read. Most large organizations hire project managers to handle various details of the project.
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  • What is the slope-intercept method?

    Q: What is the slope-intercept method?

    A: The slope-intercept method allows linear equations in algebra to be solved and graphed when given the slope of a line and the y-intercept. It is expressed in the form y = mx + b, where x and y are an ordered pair, m is the slope of the line expressed as a ratio, and b is the y-intercept.
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  • Q: What is dimensional analysis?

    A: Dimensional analysis is a method that uses conversion factors to move from one unit of measurement to another. This is because multiplying any number by 1 doesn't change its value. An example is calculating the amount of seconds in a day, done by multiplying one day by the conversion factor 24 hours and again by the factor 60 minutes and again by the factor 60 seconds.
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