Data Graphs

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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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  • 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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  • 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 a tally chart made?

    Q: How is a tally chart made?

    A: To make a tally chart, single lines are drawn next to one another until reaching five, where the fifth line crosses the four other lines diagonally. This is a simple charting method that can be used quickly for surveys or other needs.
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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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  • 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 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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  • 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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  • 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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  • 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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  • Q: How do you make a tape diagram?

    A: A tape diagram is a visual way to solve word problems in mathematics, and the way to make one is to draw colored blocks to represent the quantities in the word problem. Redrawing the colored blocks an appropriate number of times makes it easier to solve the word problem.
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  • Q: What is a quartic function graph?

    A: A quartic function graph shows the curve of a function in which the highest-degree term has x^4. Quartic graphs made from polynomials often have three extrema, two points of inflection and up to four x-intercepts. They can make symmetrical or asymmetrical W shapes.
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  • What is the purpose of a bar graph?

    Q: What is the purpose of a bar graph?

    A: A bar graph is a way to visually represent a set of data. Bar graphs are particularly useful for data that is easy to categorize. The category is traditionally placed on the x-axis, and the values are put on the y-axis.
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  • Q: What are opposite rays?

    A: Two rays are opposite rays in geometry if they have a common initial point and form a straight line. Essentially, these rays point in opposite directions. The common initial point is also called the end point of a ray.
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  • What is a bipartite graph?

    Q: What is a bipartite graph?

    A: A bipartite graph, also known as a bigraph, refers to a graph whose vertex set can be divided into two independent sets. The division is done in such a way that each edge of the graph connects a vertex in the first set to a vertex in the second set.
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  • Q: How do you graph a piecewise-defined function?

    A: Graphing a piecewise-defined function is a process that takes a variable amount of time depending on the complexity and scale of the function being graphed. You need graphing paper and a pencil.
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  • Q: Are printable blank grids available online?

    A: Many websites have blank grid paper available to print for personal or professional use. Sites such as WaterproofPaper.com, Incompetech.com, PrintablePaper.net and MathBits.com offer a wide range of options for generating and printing graph paper to suit any need or purpose, including triangular, hexagonal and asymmetrical graph paper.
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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: How do I read a line graph?

    A: Use the titles of the vertical and horizontal axes of a line graph to understand the plotted points on it. The horizontal axis reflects an independent variable, such as time elapsed or occurrences of an event, while the vertical axis reflects the effect of that variable on a different factor.
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  • What is a frequency table?

    Q: What is a frequency table?

    A: A frequency table is a mathematical graph that identifies the number of times pieces of data occur in a given sequence. Most frequency tables contain three columns and between five and ten rows.
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