Math 110 Course Resources - Implicit Differentialon & Related Rates Course Packet on related rates The wholesale price p of e-tablet writing styluses in dollars is related to the supply x in thousands of units by 200p2- x2= 4991 If 3,000 styluses are available at the beginning of a week, and the price is falling at 12 cents per week, then supply is O rising Offalling at a rate of styluses per week