Question

5. Let R=((L1, L2): L1 is parallel to L 2 and L1: y=x-4) then which of the following can be taken as L2 ?
a. 2x-2y+5-0
b. 2x+y=5
c. 2x + 2y + 7 =0
d. x+y=7
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Answer 1

Given:

R=((L1, L2)

L1||L2

The correct option is "a"

slop of L1=1

slop of L2=1

2x-2y+5=0

-2y=-2x-5

y=x+5/2

slop of 2x-2y+5=0 is 1

so 2x-2y+5=0 can be taken as L2

Hence the answer is 2x-2y+5=0