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Which graph would you use for each? The number of students in each house: red, blue, green and…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Which graph would you use for each?
- The number of students in each house: red, blue, green and yellow.
- A baby's mass at the end of each month for a year.
- The finishing times of 200 runners in a marathon.
- How a city's water is shared among homes, farms and factories.
Need a reminder? The key ideaShow
A bar chart has one bar for each category, with gaps. A pie chart shows shares of a whole: the angle of a slice is . A histogram shows numbers put in groups of equal width. The bars touch, and the height of a bar is the number of values in its group. A line graph joins values over time.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Houses are categories: a bar chart.
Step 2. (b) A mass that changes month by month: a line graph.
Step 3. (c) Many numbers, best put in groups: a histogram.
Step 4. (d) Shares of one whole: a pie chart.
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