Sonja is running laps on the track. Which description best matches what is shown on the graph?

A graph is shown in the xy-plane. The x-axis is labeled as Time left parenthesis in minutes right parenthesis and the y-axis is labeled as Distance left parenthesis in miles right parenthesis. The values on the x-axis ranges from 0 to 15 in increments of 3 and the values on the y-axis ranges from 0 to 2 in increments of 1. A curve starts from the origin and goes up in the shape of a concave up curve. The graph is labeled as Sonja's Exercise.

A. Sonja’s running slowly decreased for the first 3 minutes, and then her running increased quickly.

B. Sonja’s running slowly increased for the first 3 minutes, and then her running increased quickly.

C. Sonja slowly increased speed the entire time she ran laps.

D. Sonja slowly decreased speed the entire time she ran laps.

1 answer

B. Sonja’s running slowly increased for the first 3 minutes, and then her running increased quickly.

This is because the curve starts from the origin and goes up in the shape of a concave up curve, indicating that Sonja is increasing her speed. Additionally, the graph is labeled as "Sonja's Exercise," implying that she is likely exercising and therefore increasing her speed as she progresses. The fact that the curve starts off more gradually and then increases more quickly also supports option B.