Question

Debi walks laps around the mall for exercise during the winter months. The table represents the number of steps recorded on her pedometer as she walks laps around the mall one day.

A table showing Debi's Walk around the Mall with two columns and six rows. The first column, Laps, has the entries, 0, 1, 2, 3, 4. The second column, Steps, has the entries, 1,875; 4,300; 6,725; 9,150; 11,575.
Which statement is true about the graph of the line representing Debi’s data?

Debi walks 1,875 steps per lap around the mall.
One lap around the mall is equal to 2,425 steps.
One lap around the mall is equal to 4,300 steps.
Debi walks 6,175 steps per lap around the mall.

Answer 1

One lap around the mall is equal to 2,425 steps.

Reason: the step increase per lap is constant: 4,300 − 1,875 = 2,425 (and 6,725 − 4,300 = 2,425, etc.), so the slope is 2,425 steps per lap.