We Decide to Conduct a Multiple Regression Analysis to Predict

We decide to conduct a multiple regression analysis to predict the attendance at a major league baseball game. We use the size of the stadium as a quantitative independent variable and the type
Of game as a qualitative variable (with two levels - day game or night game) . We hypothesize the
Following model: $$\mathrm { E } ( \mathrm { y } ) = \beta _ { 0 } + \beta _ { 1 } \mathrm { x } _ { 1 } + \beta _ { 2 } \mathrm { x } _ { 2 } + \beta _ { 3 } \mathrm { x } _ { 3 }$$
Where $\mathrm { x } _ { 1 } =$ size of the stadium
$x _ { 2 } = 1$ if a day game, 0 if a night game
A plot of the $y - x$ relationship would show:

A) Two non-parallel lines
B) Two parallel curves
C) Two non-parallel curves
D) Two parallel lines