The table below represents the velocity of a car as a function of time: time (seconds) x velocity (m/s) f (x) 15 45 22 66 29 87 36 108 the average rate of change of the function between x = 15 to x = 29 is /s2 and represents the car's acceleration. answer for blank 1:

By definition we have to:
 The average rate of change:
 AVR = (f (x2) - f (x1)) / (x2 - x1)
 Substituting the values we have:
 AVR = (87 - 45) / (29 - 15)
 Rewriting we have:
 AVR = (42) / (14)
 AVR = 3
 
 The average rate of change of the function between x = 15 to x = 29 is 3 m / s2 and represents the car's acceleration