A salesman's commission varies directly as his sales. Write the formula relating this situation and denote the variables. If the comission is $150 for $1000 in sales, find the commission for $3750 in sales. determine rate of commision

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.