A regression model between sales (y in $1000), unit price (x1 in
dollars), and television advertisement (x2 in dollars) resulted in
the following function:
ŷ = 7 - 3x1 + 5x2
For this model, SSR = 3500, SSE = 1500, and the sample size is
18. The adjusted R-squared or adjusted coefficient of determination
for this problem is
0.7
0.66
0.825
-0.66