Suppose That the Sample Regression Equation of a Second-Order Model $= 2.50 + 0.15 x + 0.45 x ^ { 2 }$

Multiple Choice

Suppose that the sample regression equation of a second-order model is: $= 2.50 + 0.15 x + 0.45 x ^ { 2 }$ . The value 2.50 is the:

A) intercept where the response surface strikes the y-axis.
B) intercept where the response surface strikes the x-axis.
C) predicted value of y.
D) predicted value of y when x = 1.