Constructing a graph of speed against time requires drawing two orthogonal axes. We assign elapsed time to the horizontal axis and instantaneous velocity to the vertical axis. Choosing uniform grid intervals allows us to plot pairs accurately from a data schedule and connect them with a straight ruler to show steady speed change. By evaluating these linear plots, you will see how mapping acceleration helps monitor driving speeds for better road safety. Use Figure 1 to see an example of a linear plot showing constant acceleration.
- Plot time on the horizontal axis and velocity on the vertical axis using uniform grid scales.
- Each pair of table values forms a coordinate point plotted on graph paper.
- Joining the plotted points with a straight line produces a velocity-time graph for constant acceleration.
- Examine the resulting linear plot and share observations regarding constant positive acceleration with your peers.
Check question: A motorcycle moving along a straight road has recorded values: at , ; at , ; at , ; at , . If plotted on a velocity-time graph, what is the vertical coordinate corresponding to ?
Show answer
. Reading directly from the given values, at , the velocity value is . On a velocity-time graph, velocity represents the vertical coordinate.
