Data Graphs

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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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Q: What is the way to find horizontal asymptotes?

    A: Finding the horizontal asymptote of an equation depends on the degree of the largest exponent of the denominator. Horizontal asymptotes are horizontal lines that the graph of an equation approaches but doesn't reach.
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  • Q: What are some examples of correlation coefficients?

    A: Some examples of correlation coefficients are the relationships between deer hunters and deer in a region, the correlation between the distance a golf ball travels and the amount of force striking it and the relationship between a Fahrenheit and a Celsius temperature value. Correlation coefficients are measured within the range of -1 and 1. A stronger absolute value indicates a stronger linear relationship between the two variables.
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  • Q: How do you graph a circle?

    A: The equation to graph a circle is written in the standard form (x - h)^2 + (y-k)^2 = r^2, where the ordered pair (h, k) is the center of the circle and r is the radius. To get the equation to this form, you may need to complete the square.
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  • Q: What is rate of change?

    A: The rate of change, also known as the slope of a line, is a measure of how fast the line changes in the vertical direction compared to the horizontal direction. Typically, the vertical axis is the y-axis, and the horizontal axis is the x-axis.
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  • What are vertices in math?

    Q: What are vertices in math?

    A: Vertices are the points, or corners, in geometrical and mathematical shapes where two or more lines meet but do not cross, according to Math Open Reference. Vertices can exist in two-dimensional and three-dimensional shapes. The singular form of vertices is vertex. Sometimes, the term vertex is also used to describe certain points on quadratic equations.
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  • Q: How do you graph inequalities?

    A: The first step in graphing an inequality is to draw the line that would be obtained, if the inequality is an equation with an equals sign. The next step is to shade half of the graph.
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  • Q: What are the advantages and disadvantages of organizing data with tables and graphs?

    A: The advantages of using tables and graphs to organize data include easy visualization of statistics, poignant descriptions of data, the provision of a summary of the overall work and the interest people show to graphics over words, according to Texas A&M University. Disadvantages include the technical precision, time and funding resources necessary to create tables and graphs.
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  • Q: What is a stem and leaves graph?

    A: A stem and leaves graph, also known as a stem and leaf plot, is a special table used in mathematics. Within a stem and leaves graph, each data value is split into a stem, which is the first digit or digits, and a leaf, which is usually the last digit.
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  • Q: How do you make a frequency table?

    A: To make a frequency table, draw a table with three columns and one header row. Label the columns "Value," "Tally" and "Frequency". Fill the first column with the data values in an ascending order. Fill the middle column with a tally count for each time a data value appears in the original set of numbers, then count up the tallies for each data value to obtain the frequency for each one.
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  • Q: How do you use the Jobst stocking size chart?

    A: To use the Jobst size chart for medical compression stockings, base the size you select on the measurements provided by the chart. A size chart is available on Jobst-USA.com, as of 2015.
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