Before we move on, let's just have a look at those numerical estimates, can we look at the coefficients on income, notice that in this model because we've logged both dependent and the independent variables, right, the coefficients that we estimate are elasticities, right, so we can read those coefficients off directly as elasticities and that's the case for any model in which all the variables are logged  right, in er, if we didn't log the data, in order to calculate the elasticity we have to multiply a coefficient the computer gives us by a erm price quantity ratio, price less, less  part of the income constant ratio to obtain the income elasticities.