=+18. House prices. How does the price of a house depend on its size? Data from Saratoga, New York, on 1064 randomly selected houses that had been sold include data on price ($1000s) and size 11000 ft 22, producing the following graphs and computer output:

800 600 400 200 1.25 2.50 3.75 5.00 Price ($1000’s)

Size (1000 ft 2

)

Dependent variable is: Price