The table below represents the velocity of a car as a function of time.

table:
time velocity
(hour) (miles/hour)
x y
0 50
1 52
2 54
3 56

part 1: what is the y-intercept of the function, and what does this tell you about the car?

part 2: calculate the average rate of change of the functino represented by the table between x=1 to x=3 hours, and what does the average rate represent?

part 3: what would be the domain of the function if the velocity of the car was measured until it reached 60 miles/hour and the car does not change motion? 1