For a statistics class the linear regression leastsquares li

For a statistics class, the linear regression least-squares line between the number of hours studied (X), and the score in the mid term examination (Y) was Yhat = 32 + 2.5 X. For a student who studied for 10 hours, what was the grade predicted by the regression line?

Solution

we just need to sustitute x = 10 in the equation

Y = 32 + 2.5*10

Y = 32 + 25

Y = 57