To determine which graph shows a car moving with constant speed, look for a graph that has a straight line. A straight line indicates that the distance is changing at a consistent rate over time, which means the speed is constant.
- Graph A: If it is straight, then it's constant speed.
- Graph B: If it is also straight, then it's constant speed.
- Graph C: This probably indicates acceleration or deceleration (curved line).
- Graph D: Like Graph C, this may also show varying speeds.
Based on the description, the correct response would be any graph that is a straight line (A or B), indicating constant speed. Without seeing the graphs, I can't specify which one it is, but the constant speed graph will not have curves or varying slopes.