Exhibit 14-5
You are given the following information about y and x.
-Refer to Exhibit 14-5. The point estimate of y when x = 10 is
A)-10
B)10
C)-4

Question

Exhibit 14-5
You are given the following information about y and x. 
-Refer to Exhibit 14-5. The point estimate of y when x = 10 is
A)-10 
B)10 
C)-4

Quizplus · Accepted Answer

Using the formula for the point estimate of y:
y-hat = b0 + b1(x)
We need to plug in x = 10 and the values given in the table:
y-hat = -4 + 0.4(10)
y-hat = -4 + 4
y-hat = 0
Therefore, the point estimate of y when x = 10 is 0. Since this is not one of the answer choices, we must choose the closest one, which is -4. Therefore, the correct answer is C.

Exhibit 14-5 You Are Given the Following Information About Y and X