Question:

Find the best predicted value of Y, given that X=1. The summary statistics come from paired sample data.

r=-.89, y=3.57, n=15, and the equation of the regression line is y^=25-8x.

My work:

t=square root of (13*-1.78) / the square root of (1- -.89^2)

Now this is as far as I have gotten...it is not letting me compute the equation.

Please help!!