If the demand curve is linear and downward sloping, which of the following statements is not correct? Select one: a. Starting from a point on the upper part of the demand curve, an increase in price leads to a decrease in total revenue. b. Different pairs of points on the demand curve cannot result in different values of the slope of the demand curve. c. Different pairs of points on the demand curve can result in different values of the price elasticity of demand. d. Demand is more elastic on the lower part of the demand curve than on the upper part.

If a demand curve is linear and downward sloping, different points on the line can show different values of slope. The value of slope will be equal to the ratio of change in price to change in quantity demanded. The value of slope will be the same throughout the line.

The price elasticity is the ratio of change in quantity to change in price. The price elasticity can be different for different points on the demand curve.

The points on the lower parts are more inelastic while the points on the upper portion are more elastic. The midpoint represents unit price elasticity.

Since the upper portion is more price elastic, an increase in price will cause a more than proportionate decrease in the quantity demanded. This will cause the total revenue to decrease.