Given: J(13, 10) and K(4,2) Write an equation for the line through J and perpendicular to JK. TT √+

Prove that if two lines neither horizontal nor vertical are perpendicular, then the product of their slopes is -1. HINT: See Figure 10.19. You need to show and use the fact that ABC~EDC.

Determine whether the line through the given points and the line through R(3,5) and S(2,7) are parallel, perpendicular, or neither. P(a,a);Q(3a,6a)(a0)