The following table shows the length, in centimeters, of the humerus and the total wingspan, in centimeters, of several pterosaurs, which are extinct flying reptiles. (A graphing calculator is recommended.) Pterosaur Data Humerus, x Wingspan, y Humerus, x 24 32 22 17 13 4.4 3.2 1.5 610 760 cm 440 380 280 69 53 24 20 27 15 15 9 4.4 2.9 Wingspan, y 510 580 300 320 250 55 49 (a) Find the equation of the least-squares regression line for the data. (Where x is the independent variable.) Round constants to the nearest hundredth. ŷ = (b) Use the equation from part (a) to determine, to the nearest centimeter, the projected wingspan of a pterosaur if its humerus is 52 centimeters. HER

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