Question

A certain student watches television for an average of 38 minutes per night. Based on Marshall's model equation, how many minutes will that student spend exercising?

Answer 1

Question:

Marshall models the data with the equation y = −1.5x + 121, where x represents the number of minutes spent watching television and y represents the number of minutes spent exercising.

A certain student watches television for an average of 38 minutes per night. Based on Marshall's model equation, how many minutes will that student spend exercising?

Answer:

The student will exercise for 64 minutes

Explanation:

Given

`y = -1.5x + 121`

x = minutes of TV

y = minutes on exercising

Required

Find y when x = 38

`y = -1.5x + 121`

Substitute 38 for x

`y = -1.5 * 38 + 121`

`y = -57 + 121`

`y = 64`