1 Glycerin, an ingredient in some toothpastes, can interfere with strengthening your teeth. 2  Glycerin layers your tooth in a sticky film that keeps the minerals in your saliva from interacting with your enamel to strengthen it.. Chew sugar-free gum. The gum promotes saliva production, without the sugar that makes weakened enamel worse. Gum with the natural sweetener xylitol doesn't feed the bacteria that weakens your enamel, and xylitol has actually been shown to strengthen tooth enamel.
Demand functions for a straight-line demand curve take the following form: Quantity = a - (b x Price). where a and b are constants that must be determined for each particular demand curve. When price changes, the result is a change in quantity demanded as one moves along the demand curve.
Elastic Demand Curves. If the demand for an item changes proportionately more than the price changes, then the item is price elastic. For example, if a 1-percent price increase leads to a decrease in demand of 2 percent, then the item has an elastic demand.These items usually have many substitutes or are luxury items.f the demand for an item changes proportionately less than the price changes, then the item is price inelastic. For example, a demand curve is inelastic if the price of an item increases by 1 percent and purchases decrease by half a percent.