Question

post test: quadratic relationships
which of the following statements is true about this situation?
a. the electric car is not moving at 6 seconds and 12 seconds.
b. the electric car is not moving at 0 seconds and 12 seconds.
c. the electric car is not moving at 0 seconds and 12 seconds.
d. the electric car is not moving at 0 seconds and 6 seconds.

Explanation:

Step1: Analyze the graph

The graph likely represents the motion of an electric - car with time on the x - axis. When the car is not moving, the velocity is 0. This usually corresponds to the points where the slope of the position - time graph is 0 (since velocity is the derivative of position with respect to time). In a quadratic - like graph, the slope is 0 at the vertex.

Step2: Identify the zero - velocity points

By observing the graph, we can see that the car is at rest (not moving) at the starting point (0 seconds) and at 12 seconds.

Answer:

C. The electric car is not moving at 0 seconds and 12 seconds.