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Destinirainer
30.03.2020 •
Mathematics
A year-long fitness center study sought to predict the amount of muscle mass gained (kilograms) based on the weekly time spent working out under the guidance of a trainer (minutes.) The slope of the regression line for the study was 0.12 and the y-intercept was 2.04.
For each additional minute (weekly) spent working out, the average muscle mass changed by:
A) 14.40 kg
B) 750.84 kg
C) 16.44 kg
D) 18.48 kg
E) None of the above
Solved
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Ответ:
E. None of the Above
Step-by-step explanation:
The slope of the regression line for the study, m= 0.12
The y-intercept , c= 2.04.
Using the Slope- Intercept form of the Equation of a line: y=mx+c
The line is:
y=0.12x+2.04
For every additional minute x, the average muscle mass changed by 0.12kg, the Slope of the line.
CHECK
y(1)=0.12(1)+2.04=2.16kg
y(2)=0.12(2)+2.04=2.28kg
Change: y(2)-y(1)= 2.28-2.16=0.12kg
Ответ:
We have the solution:
Since there are three negative numbers being multiplied the product is always negative...
So we have the final answer as -152
Hope this helps