A-D Fitting a straight line to a set of data yields the prediction line Y^i=7+2X1. The values of X used to find the prediction line range from 7 to 30 . a. Should this model be used to predict the mean value of Y when X equals 8 ? b. Should this model be used to predict the mean value of Y when X equals -8 ? c. Should this model be used to predict the mean value of Y when X equals 0? d. Should this model bo usod to predict the mean value of Y when X equals 29 ? a. Should this model be used to prodict the mean value of Y whon X equals 8 ? Yes No Not enough information.