Since the position as a function of time for the ball plotted in Figure \PageIndex1 is linear, we can summarize our description of the motion using a function, x(t), instead of having to tab...Since the position as a function of time for the ball plotted in Figure \PageIndex1 is linear, we can summarize our description of the motion using a function, x(t), instead of having to tabulate the values as we did in Table 3.1.1. The velocity, vx, is simply the difference in position, ∆x, between any two points divided by the amount of time, ∆t, that it took the object to move between those to points (“rise over run” for the graph of x(t)):
