Prehistoric pottery vessels are usually found as sherds (broken pieces) and are carefully reconstructed if enough sherds can be found. provides data relating x = body diameter in centimeters and y = height in centimeters of prehistoric vessels reconstructed from sherd The following Minitab printout provides an analysis of the data. Predictor Coef SE Coef T P Constant -0. 230 2. 429 -0. 09 0. 929 Diameter 0. 7500 0. 1471 4. 11 0 . 002 S 4.07980 R-Sq = 70.78 (a) Minitab calls the explanatory variable the predictor variable. Which is the predictor variable, the diameter of the pot or the O diameter O height (b) For the least-squares line y = a + bx, what is the value of the constant a? What is the value of the slope b? (Note: The slope predictor variable.) Write the equation of the least-squares line. a b = y = (c) The P-value for a two-tailed test corresponding to each coefficient is listed under P. The t value corresponding to the coefficier the P-value of the slope