If someone buys only one pound of a product they are charged $20. if a person purchases more than one pound, they are charged $1 less per pound for each pound more than 1. for example, if the purchased 3 pounds, they would be charged $18 per pound. give an equation that gives the amount the purchaser pays in terms of the number of pounds they purchase.

Is there a direction u in which the rate of change of f(x, y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.