Question

distance - time graph which line has the fastest speed? a none b c

Explanation:

Step1: Recall speed - distance - time relation

Speed is given by the slope of the distance - time graph ($s=\frac{d}{t}$, where $s$ is speed, $d$ is distance and $t$ is time). A steeper slope indicates a higher speed.

Step2: Compare slopes of lines

Line A has the steepest slope among lines A, B and C on the distance - time graph.

Answer:

A. A