The following regression model shows the relationship between selling price of a house [y] and the number of bedrooms [x]; y =100+0.6 x. Another separate regression model shows the relationship between selling price of house [y] and the level of the crime per week in the neighborhood [x]; y =100-0.3 x.

a. Draw the regression line for the first and second regression.

b. Interpretation for the slope coefficient in the first and second regression.

c. What is the estimated value of the price of a house which has two bedrooms?