Question

Problem 9

Answer 1

Given information

 A car travels along the - axis with increasing speed.

Step-by-step explanation

Step 1.

Increasing speed means that the slope must be getting steeper over time. In graphs (b) and (e), the slope remains constant, so these are cars moving at constant speed. In graph (c), as time increases x decreases. However, the rate at which it decreases is also decreasing. This is a car slowing down. In graph (d), the car is moving away from the origin, but again it is slowing down. The only graph in which the slope is increasing with time is graph (a).