Y = 3x – 1 and y = -2x + 9 please show work i have a 61 and its only the 2rd 9 weeks trying to get my grade up

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Can someone me with my math problem pls my teacher is on my back about this

Graph a point. start at your origin, move left 10 units, and then move up three units which ordered pair is the point you graphed