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For each job, say which graph you would draw: a line graph, a scatter plot, a bar chart or a…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
For each job, say which graph you would draw: a line graph, a scatter plot, a bar chart or a histogram. Give the reason in one sentence.
- The temperature of a room every minute for an hour.
- The number of students in each of six clubs.
- The height and the arm span of 40 students.
- 500 measurements of the time of fall of a ball from the same height.
- The sales of a shop in each month of a year.
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, compare your working with the solution.
Plan. Ask what the question is: a change, a link, separate groups, or a spread.
- A line graph. The temperature changes with time, and the points follow each other.
- A bar chart. The clubs are separate groups, and we compare their sizes.
- A scatter plot. Each student gives two measurements, and we ask whether they are linked.
- A histogram. The same quantity is measured again and again, and we want to see how the values are spread around the centre.
- A bar chart for comparing the months as separate groups. A line graph is also good if you want to show the trend through the year, because the months follow each other in time.
Answer: 1 line graph, 2 bar chart, 3 scatter plot, 4 histogram, 5 bar chart (or a line graph for the trend).
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