A. Constant elasticities of demand are observed at different points along a linear demand curve.
B. In the linear model approach, the effect on demand of a one-unit change in any independent variable is assumed to be constant.
C. In the log-linear model approach, the effect of a one-unit change in any independent variable will tend to vary.
D. The elasticities of demand are different at various points along a multiplicative demand curve.
E. Log-linear models assume constant elasticities.

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The Answer of 
A. Constant elasticities of demand are observed at different points along a linear demand curve.
B. In the linear model approach, the effect on demand of a one-unit change in any independent variable is assumed to be constant.
C. In the log-linear model approach, the effect of a one-unit change in any independent variable will tend to vary.
D. The elasticities of demand are different at various points along a multiplicative demand curve.
E. Log-linear models assume constant elasticities.

A Constant Elasticities of Demand Are Observed at Different Points