Question 7 0.28 pts A student carefully collects position and time data while observing their friend riding by on a skateboard. They produce the time versus position graph shown below, where the uncertainty is small enough to be hidden in the data markers on the graph. They create a best-fit line, which is described by the equation: t = 0.49 x + 2.1 where t represents time in seconds and a represents position in meters. Which of the following is the best interpretation of the number 0.49? (Note: An interpretation is not simply a name given to a quantity.) Time (s) -4 -2 0 2 4 6 8 10 12 Position (m) The number tells us how many meters the student's friend moves for every second they ride. The number tells us how many seconds it takes the student's friend to move one meter. The number tells us the velocity of the student's friend. The number tells us how quickly the student's friend changes speed. The number doesn't have a specific meaning