equations ( arepn = (xi )(yi ypn = (xi ( xb ( provided that not all xi are the same edwin hubble discovered that the universe is expanding if is galaxy' recession velocity (relative to any other galaxyand is its distance (from that same galaxy)hubble' law states that hdwhere is known as hubble' constant the following are distance (in millions of lightyearsand velocity (thousands of miles per secondmeasurements made on five galactic clusters distance velocity state the regression model and estimate the multiple linear regression model ( can be viewed as first-order approximation of the general model (xe( where var and (xis some known or unknown function of ddimensional vector of explanatory variables to see thisreplace (xwith its first-order taylor approximation around some point and write this as xb express and in terms of and table shows data from an agricultural experiment where crop yield was measured for two levels of pesticide and three levels of fertilizer there are three responses for each combination table crop yields for pesticide and fertilizer combinations fertilizer pesticide low medium high no yes (aorganize the data in standard formwhere each row corresponds to single measurement and the columns correspond to the response variable and the two factor variables