SOLUTION: is y=-7/8x+3 and -7y=-8x perpendicular

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Question 1126473: is y=-7/8x+3 and -7y=-8x perpendicular
Found 2 solutions by josgarithmetic, MathLover1:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
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Is y=-7/8x+3 and -7y=-8x perpendicular ?
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slopes versus ;

They certainly are (perpendicular).

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
to see is and perpendicular, first write in slope-intercept form


compare their slopes:


as you can see, is negative reciprocal of
or
by definition, lines are perpendicular their slopes are negative reciprocal to each other




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