Question

at 15 seconds, who has the greatest velocity? (1 point) joy ivan shirley chris

Explanation:

Step1: Recall velocity - distance - time relation

Velocity $v=\frac{d}{t}$, and on a distance - time graph, the slope of the line represents velocity.

Step2: Analyze slopes at $t = 15s$

At $t = 15s$, Ivan's line has the steepest slope among the four lines (Joy, Ivan, Shirley, Chris). A steeper slope on a distance - time graph means a higher velocity.

Answer:

B. Ivan