Nine pairs of data yield r=0.867 and the regression equation y=19.4+0.93xwhat is the best predicted value of y for x=40?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

An internet company charges $8.95 per month for the first 3 months that it hosts your web site. then the company charges $11.95 per month for web hosting. how much money, in dollars, will the company charge for 8 months of web hosting?