Explain why perpendicular lines (that are not horizontal and vertical) have slopes whose product is

Explain why perpendicular lines (that are not horizontal and vertical) have slopes whose

product is

a) Negative, andLet the two lines in a plane be , y=mx+b and y=nx+cThese lines are not parallel and they intersect. Then the triangle formed bythe graphs of these two lines and the y-axis is a right triangle if...