Asked by crazycheese

27) Tell whether the lines for the pair of equations would be parallel, perpendicular, or neither. y = -3x + 9 y = 1 3 x - 3 A) Perpendicular B) I don't know C) Parallel D) Neither
Answered by oobleck
different slopes, but the product of the slopes is not -1.
what does that tell you?
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