25 y x 2y 3x 5 y 2z 4 and 1 b y 32 2 and y 32 5 are paralel because the slope of each one is c y 2z 4 and 2X are perpendicular because the product of the spe d y 27 3 and y 2r 3 y 32 3 Section Exercises 44 Exercse 25 y 2x 3 X are perpendicular because the product of the spea y 38 5 Xa perpendicular because the product of the siges y 2 2 23 2 3 2 G