Making a scale for each axis is like making a ruler. Spacing must be the same, and your numbers must go up by equal amounts. In detail, here are rules about the scale you choose:
- Each division on the x axis must be equal.
- Each division on the y-axis must be equal.
- The divisions on the x-axis may or may not equal the divisions on the y-axis. (For example, you could count by twos on the x-axis and count by fives on the y-axis.)
We need our x-axis to go from 0 to 16. Since the time is measured in 2-minute intervals, and we only need to go from 0 to 16, let’s count by 2s on the x-axis.
We need our y-axis to go from 0 to 58. Let’s count by 5s on the y-axis and go from 0 to 60. |