parts $($a$)$ and $($b$)$ below.

a$.$ What is the equation of the regression line? Select the correct choice below and fill in the answer boxes to complete your choice.

A$.$ hat$(y)=x$

B$.y=$

$+(125)$

$$

hat$(y)=$ hat$(x)$

$$

$$

$()hat(x)$

b$.$ What does the symbol hat$(y)$ represent?

A$.$ The symbol hat$(y)$ represents the average price of hotels in the area

B$.$ The symbol hat$(y)$ represents the amount that price increases with a $1-$point increase in rating

C$.$ The symbol hat$(y)$ represents the predicted value of price.

D$.$ The symbol hat$(y)$ represents the expected price when the hotel's rating is $0$