The graph below shows the distance (y) in kilometers of two cars from their destination at different times (x) in minutes. The table shows the values plotted on the graph.

graphs of y is equal to 70 minus x and y is equal to 70 multiplied by 0.98 to the power of x

Time
(in minutes)
x 0 10 20 30 40 50 60 70
Car 1
(in km)
y 70 60 50 40 30 20 10 0
Car 2
(in km)
y 70 57.19511 46.73256 38.18388 31.199 25.4919 20.82871 17.01861

Question

The graph below shows the distance (y) in kilometers of two cars from their destination at different times (x) in minutes. The table shows the values plotted on the graph.

graphs of y is equal to 70 minus x and y is equal to 70 multiplied by 0.98 to the power of x

Time
(in minutes)
x 	0 	10 	20 	30 	40 	50 	60 	70
Car 1
(in km)
y 	70 	60 	50 	40 	30 	20 	10 	0
Car 2
(in km)
y 	70 	57.19511 	46.73256 	38.18388 	31.199 	25.4919 	20.82871 	17.01861

anonymous · Answer

Part A: What does the x-intercept of the function for car 1 represent? (2 points)

Part B: What does the y-intercept of the function for car 2 represent? (2 points)

Part C: What is the domain of the functions for car 1 and car 2? (2 points)

Part D: What is the average rate of change from x = 30 to x = 40 for the function representing the motion for car 2? What does the value of this average rate of change represent? (4 points)