Does prison really deter violent crime? Let x represent percent change in the rate of violent crime and y represent percent change in the rate of imprisonment in the general U.S. population. For 7 recent years, the following data have been obtained. x 6.0 5.3 4.1 5.2 6.2 6.5 11.1 y 1.1 -3.9 7.6 4.0 3.6 0.1 -4.4 LO USE SALT Complete parts (a) through (e), given 2x - 44. x - 44.4, Ey -17.5, Ex? - 311 84, Zy? =122.51, Exy = -106.4, and r = 0.0943. (b) Verify the given sums Ex, Ey, Ex , Ey , Exy, and the value of the sample correlation coefficient r. (Round your value for r to four decimal places.) Ex = Ey = Ex = Eyz = Exy = (c) Find x, and y. Then find the equation of the least-squares line y = a + bx. (Round your answer to four decimal places.) X = y = V = (e) Find the value of the coefficient of determination . What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for 2 to four decimal places. Round your answers for the percentages to two decimal place.) explained unexplained