An agent for a real estate company in a large city would like to be able to predict the monthly rental cost for apartments, based on the size of the apartment, as dened by square footage. A sample of eight apartments in a neighborhood was selected, and the information gathered revealed the data shown below. For these data, the regression coefcients are be = 63.8672 and b1 = 1.1571. Complete parts (a) through (d). Monthly Rent ($) 9?5 1,450 825 1,550 2,000 975 1,750 1,400 El Size(Square Feet) 900 1,200 900 1,1001,8OO 750 1,250 1,100 a. Determine the coefficient of determination, r2, and interpret its meaning. r2 = 0.810 (Round to three decimal places as needed.) What is the meaning of r2? r2 measures the proportion of variation in apartment size that can be explained by the variation in monthly rent. r2 measures the proportion of variation in monthly rent that cannot be explained by the variation in apartment size. V r2 measures the proportion of variation in monthly rent that can be explained by the variation in apartment size. r2 measures the proportion of variation in apartment size that cannot be explained by the variation in monthly rent. b. Determine the standard error of the estimate, SYX' SYX = (Round to three decimal places as needed.)