Question

NEED HELP ASAP

The equation yˆ=−2.5x+222.5 models the amount of cholesterol, LDL , for a person, in mg/dl , where x is the time spent exercising per day, in minutes.
According to the regression equation, what is the amount of cholesterol for a person exercising 20 minutes a day?
A. 61.5 mg/dl
B. 81.5 mg/dl
C. 172.5 mg/dl
D. 272.5.5 mg/dl

Answer 1

172.5

Explanation:

Confirmed on test

Answer 2

172.5 mg/dl

Explanation:

Given the equation y= -2.5x + 222.5, where 'x' is the time spent exercising in minutes. If we want to know the amount of cholesteron for a person exercising 20 minutes a day, we just have to subtitute 20 into the equation for x.

So we have: y= -2x + 222.5 → y= -2.5(20 minutes) + 222.5 = 172.5 mg/dl