Question

On a speed-time graph, the ___ measures acceleration.

Answer 1

Have you taken some calculus yet? Either way, think about how speed and acceleration is related. Speed is (meters)/(second) and acceleration is (speed)/(second). In a speed-time graph, the y-axis is speed and the x-axis is time. Since acceleration is (speed)/(time), you can hence get the acceleration by dividing the y-axis values (the speed) by the corresponding x-axis values (the time) for each point on the graph. In other words acceleration = (y/x). It is the rate of change of y with respect to x. Sound familiar?

Answer 2

the slope measures acceleration.