The cost c, in dollars, for pencils is a function of the number of pencils purchased, n. the length l of a pencil, in inches, is a function of the time t, in seconds, it has been sharpened. graph the function shown by each table. tell whether the function is linear or nonlinear

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.