Astore sells a 9-ounce jar of mustard for $1.54 and a 15-ounce jar for $2.55. is the cost of the mustard proportional to the number of ounces for each jar? explain.

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.