The graph to the right shows the heart rate of a person watching a short romantic film, where 𝑥 represents time in minutes, and y represents heart rate in beats per minute. Answer the following questions.

(e) For the model in part (d), should the leading coefficient of the polynomial function be positive or negative? Why?

A. positive because the graph falls to the left and rises to the right

B. negative because the graph rises to the left and falls to the right

C. positive because the graph falls to the left and falls to the right

D. negative because the graph falls to the left and falls to the right

(f) Use the graph to estimate the person’s maximum heart rate during the 15 minute film.

𝑏𝑝𝑚

After how many minutes did this maximum heart rate occur?

minute(s)

(g) Use the graph to estimate the person’s minimum heart rate during the 15 minute film.

bpm

After how many minutes did this minimum heart rate occur?

◻ minute(s)