what is the correlation in regression? why correlation can't measure nonlinear relationships what does correlation mean in regression why is correlation in regression used what is correlation in regression? why is no correlation in regression how do correlations in regression work can correlation be used in regression why is correlation necessary for regression does correlation measure nonlinear relationships what is correlation in regression what does correlation mean what does correlation mean in regression analysis does linear regression correlate to linear relationship why do regression tests measure correlation can correlations be used to test a regression model why is correlation used in regression why don't linear regression models measure correlation do linear regression tests measure linear relationships what is the correlation in a linear regression test?