Choose the one alternative that best completes the statement or answers the question.
-Given the equation of a regression line is $\hat { y } = - 4.5 \mathrm { x } + 8.2$, what is the best predicted value for $y$ given $x = 7.0$ ?
A) $- 23.30$
B) $- 39.70$
C) $39.70$
D) $23.30$

Question

Quizplus · Accepted Answer

Substituting $x = 7.0$ into the equation $\hat { y } = - 4.5x + 8.2$ gives $\hat { y } = - 4.5(7.0) + 8.2 = - 31.5 + 8.2 = - 23.3$.

Choose the One Alternative That Best Completes the Statement or Answers