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
Step-by-step explanation:
Given
[tex]y = -1.5x + 121[/tex]
x = minutes of TV
y = minutes on exercising
Required
Find y when x = 38
[tex]y = -1.5x + 121[/tex]
Substitute 38 for x
[tex]y = -1.5 * 38 + 121[/tex]
[tex]y = -57 + 121[/tex]
[tex]y = 64[/tex]
