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 defined 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 coefficients are bo = 89.7175 and by = 1.0703. Complete parts (a) through (d). Monthly Rent (5) Size (Square Feet) 900 1.450 850 1,350 850 950 1,500 2,000 900 1,200 1,900 700 1,825 1.300 D 1.350 1,050 .... a. Determine the coefficient of determination, r?, and interpret its meaning. 2 = 0.843 (Round to three decimal places as needed.) What is the meaning of r?? OA. 2 measures the proportion of variation in apartment size that can be explained by the variation in monthly rent. OB. 2 measures the proportion of variation in apartment size that cannot be explained by the variation in monthly rent. OC. Z measures the proportion of variation in monthly rent that cannot be explained by the variation in apartment size. D. 2 measures the proportion of variation in monthly rent that can be explained by the variation in apartment size. b. Determine the standard error of the estimate, Sex Syx=(Round to three decimal places as needed.)