book Maths Puzzle Numerical Ability

MATCH EACH SYSTEM WITH THE CORRECT SOLUTION
X-Y=1
X=1/2Y+2

A. (3,2)
B. (3,3)
C.(-2,3)
D.(2,3)

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book Other Question

I am trying to get into level 2 algebra at my comm. college. Its been almost 8 years since i've been in school, so im a little rusty!!! Here are a few examples if you could please Write the letter corresponding to the two equations that represent perpendicular lines.

(A) y = 3x - 4
(B) y = 1/3x + 4
(C) y = -1/3x + 4
(D) y = 1/3x - 4