eight pairs of data yield the regression equation y^1=55.8+2.79x. What is the value of y for x=5.6?

Answer 1

y^1 ? , why not just y ?

y = 55.8 + 2.79(5.6)
I will let you do the button-pushing

Answer 2

I don't understand why everyone answers this problem by solving for x like that is not the most obvious thing in the world. No one needs help solving for x. I need help understanding when you use the y mean and when you solve fo x and use that....