Question

On the first day of school, Alexis decides to start doing sit-ups during her morning workout routine. Each day, she does more sit-ups than the day before.
This situation can be modeled as a linear relationship. Use the points (12, 20) and (24, 32) to find the answer.

What does the slope of the line tell you about the situation?
A. Alexis does 8 sit-ups on the first day of school.
B. Alexis does 32 sit-ups 24 days after school starts.
C. Each day, Alexis does 1 more sit-up than the day before.
D. Each day, Alexis does 4 more sit-ups than the day before.

Answer 1

Slope = (32 − 20)/(24 − 12) = 12/12 = 1.
The slope 1 means the number of sit-ups increases by 1 for each additional day, so answer C.