What Is the Value Of $y ^ { \prime }$ When $x = 3$

Multiple Choice

What is the value of $y ^ { \prime }$ when $x = 3$ , if the equation of the regression line is $y ^ { \prime } = 23.1 - 3.8 x$ ?

A) 11.7
B) 4.73
C) 5.29
D) 34.5