What is the equation of a line that passes through the point (6, 1) and is perpendicular to the line whose equation is y=−2x−6? Please hurry with this, I only have an hour left...

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.