Which Estimated Multiple Regression Contains an Interaction Term?
A) $\hat { y } = - 92 + 6 x _ { 1 } ^ { 2 } - 12 x _ { 2 } ^ { 2 }$

Multiple Choice

Which estimated multiple regression contains an interaction term?

A) $\hat { y } = - 92 + 6 x _ { 1 } ^ { 2 } - 12 x _ { 2 } ^ { 2 }$
B) $\hat { y } = 47 - 18 x _ { 1 } - 3 x _ { 1 } ^ { 2 } + 6 x _ { 2 } + 36 x _ { 2 } ^ { 2 }$ .
C) $\hat { y } = 88 + 11 x _ { 1 } + 7 x _ { 1 } x _ { 2 } + 5 x _ { 2 }$