statistics · Year 5 · AC9M5ST02
Line graphs
A line graph shows how something changes over time. Find the time on the bottom axis, go up to the point, then across to the scale. Check where the scale starts and what each gridline is worth. The change between two times is the difference between their values. A steeper segment means a faster change. An average change per week is the total change shared equally between the weeks: count the gaps between points, not the points.
Sample questions
The line graph shows the height of a sunflower each week. How tall was the sunflower in Week 2?
- Find Week 2 on the bottom axis and go up to the point.
- Go across to the scale, which goes up in 5s.
- The point is at 10.
Answer: 10
The line graph shows the number of visitors to a park each day. How many visitors came on Day 6?
- Find Day 6 on the bottom axis and go up to the point.
- Go across to the scale, which goes up in 10s.
- The point is at 30.
Answer: 30
The line graph shows the temperature at noon each day. What was the temperature on Day 2?
- Find Day 2 on the bottom axis and go up to the point.
- Go across to the scale, which starts at 10 and goes up in 2s.
- The point is at 24.
Answer: 24