3. A realtor collects data about the rental prices of apartments in a neighborhood and their size measured in square feet. They find that the apartments have an average size of 1000 square feet, with a standard deviation of 300 square feet. The apartments have an average rental price of $1500 per month, with a standard deviation of $400. The two variables have a correlation of r = 0.5.

a) Add the point of averages to the plot below and sketch in the SD line.

-..- - . .- -.. - . ." 2500 2000 -.." 1500 Rent per month (dollars) .-1. .. .. .i .. . 5. 1000 . . . . 500 1000 1500 500 Size (square feet)