how does velocity change over time during free fall
Figure 1: Graph of velocity vs. time for a car undergoing constant acceleration. Because the velocity changes at a constant rate, the slope of the velocity vs. time graph is constant. Notice the equation of the line that fits the velocity vs. time data: y = mx + b. where m is the slope and b is the y-intercept. Logger pro will assign values to m and b in order to best fit the data.