Eight pairs of data yield requals0742 and the regression equ

Eight pairs of data yield
requals=0.742
and the regression equation
y=55.8+2.79x
Also,
y=71.125.
What is the best predicted value of y for
x=9.8?
Use a significance level of 0.05.

best predicted value is given by regression equation: 55.8+2.79*9.8 = 83.142