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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?

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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

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