Question

The LSR equation for GPA on IQ is y = 0.10x - 3.49. A student with an IQ of 127 has a GPA of 7.85. Find the predicted GPA and residual for this student. Be sure to label each answer. Also, correctly interpret the slope.

Answer 1

predicted GPA=9.21, residual= 1.36, a correct value of slope would be 0.09

Explanation:

y=0.1x -3.49

y: GPA

x: IQ

y=0.1(127)-3.49

y= 9.21

Predicted GPA= 9.21

residual= 9.21- 7.85= 1.36

The equation doesn't model the exact relationship between GPA and IQ.

A better slope value could be

7.85= m(127)-3.49

m=0.09