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HOW TO CHOOSE WHICH TYPE OF GRAPH TO USE?
When to Use . . .. . . a Line graph.Line graphs are used to track changes over short and long periods of time. When smaller changes exist, line graphs are better to use than bar graphs. Line graphs can also be used to compare changes over the same period of time for more than one group. . . . a Pie Chart.Pie charts are best to use when you are trying to compare parts of a whole. They do not show changes over time. . . . a Bar Graph.Bar graphs are used to compare things between different groups or to track changes over time. However, when trying to measure change over time, bar graphs are best when the changes are larger. What is 'interpreting data'?
- Data means
**information**. So interpreting data just means working out what the information is telling you. - Information is sometimes shown in
**tables, charts and graphs**to make the information easier to read. It is important to read all the different parts of the table, chart or graph. - Tables
A table is used to write down a number of pieces of data about different things. The**title**of the table tells us what the table is about. The**headings**tell us what data is in each column.
Ratio more ... A ratio shows the relative sizes of two or more values. Ratios can be shown in different ways. Using the ":" to separate example values, or as a single number by dividing one value by the total. Example: if there is 1 boy and 3 girls you could write the ratio as: 1:3 (for every one boy there are 3 girls) 1/4 are boys and 3/4 are girls 0.25 are boys (by dividing 1 by 4) 25% are boys (0.25 as a percentage) Please try the following questions. 1) 42 points out of 66 points _____ 2) 35 rainy days out of 84 days _____ 3) 28 pounds to 40 pounds _____ 4) 28 footballs to 35 foorballs _____ 5) 28 dimes to 49 dimes _____ 6) 25 cups to 30 cups _____ 7) 16 beetles out of 20 insects _____ 8) 32 miles out of 44 miles _____ 9) 15 dimes out of 30 coins _____ 10) 4 cakes out of 20 cakes _____ http://www.mathsisfun.com/numbers/ratio.html ## Click on the button below to visit an interesting site that features animated Math stories. |
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