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Which line through (2,3) is perpendicular to y=2x+1?

A2x+y=7
Bx−2y=−4
Cx+2y=8
Dy=2x−1
Answer & Solution
Correct answer: C. x+2y=8
The perpendicular slope is −1/2, and x+2y=8 also passes through (2,3).
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