Question

The graph below models the acceleration of a car. Interpret the meaning of the vertex.

The car traveled 10 miles in 60 seconds.
It took the car 20 seconds to accelerate.
It took the car 10 seconds to reach a speed of 60 miles per hour.
It took the car 20 seconds to reach a speed of 60 miles per hour.

Answer 1

The answer would be C, because the vertex is at (10, 60). Which is 10 seconds and 60 miles per hour :)

Answer 2

The coordinate of the vertex is (10, 60)

The value '10' shows the time at 10 seconds
The value '60' shows the speed of the car as the point of 10 seconds of it travels.

Answer: It took the car 10 seconds to reach a speed of 60 miles per hour.