This is my last question I need help with.

Alogical argument that is presented in graphical form using boxes and arrows is called?

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.

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.