Question

L1 : (-1, 4) and (3, 2) L2: (2, 5) and (4, 9) A. Perpendicular B. Neither C. Parallel

Answer 1

Perpendicular

Explanation:

L1 :

let A(-1,4) B(3,2)

the slope is : (YB - YA)/(XB -XA)

(2-4)/(3+1) = -2/(4)

the slope is : -1/2

L2 :

let C(2,5) D(4,9)

the slope is : (YD - YC)/(XD -XC)

(9-5)/(4-2) = 4/(2)

the slope is : 2

2×(-1/2)= -1

Perpendicular