High Wire Graphix determines this demand function applies to a new app: D(X) = 120e-0.12x where
D(x) is the number of apps sold each day when the price is x dollars per app.
a. Determine the elasticity function E(x)
b. Find the elasticity at a price of $10.00
c. At a price of $10.00, will a small increase in price cause Revenue to increase or decrease?