Question: Florida condominiums are popular winter retreats for many North Americans. In recent years the price has steadily increased. A real estate agent wanted to know why prices of similar-size apartments in the same building vary. A possible answer lies in the floor level. It may be that the higher the floor is in the building, the greater the sale price of the apartment. He recorded the price (in $1,000s) of 1,200 square feet condominiums in several buildings in the same location that have sold recently and the floor number of the condominium. Data file Xr16-07.

a) Determine the regression line.
b) What do the coefficients tell you about the relationship between the two variables?