In Gakuen Alice, Yuka Azumi stole Narumi's Alice when she was running away. Consequently, he lost all ability to love her or anyone else. How does this work?


Question: Multivariate Linear Regression with continuous and discrete explanatory variable
Answer: Notice that you are predicting negative prices for small gross areas. Does that make sense (Please come and live in this appartment, I will give you money if you do). I would consider using a log link function. 

As for the categorical variable, I would just add indicator variables for the number of bathrooms instead of entering it as a continuous variable.