For the Situation Above, Give a Practical Interpretation Of $\hat { \beta } _ { 1 } = 228$

Multiple Choice

For the situation above, give a practical interpretation of $\hat { \beta } _ { 1 } = 228$ .

A) We expect to predict SALARY to within $2 ( 228 ) = \$ 456$ of its true value using GMAT in a straight-line model.
B) We estimate GMAT to increase 228 points for every $\$ 1$ increase in SALARY.
C) We estimate SALARY to increase $\$ 228$ for every 1-point increase in GMAT.
D) The value has no practical interpretation since a GMAT of 228 is nonsensical and outside the range of the sample data.