Question 203778
y=3x-5
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The  slope  intercept  form  is  ,,,,,y=mx+b,,,
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fitting  the  form,,,,m=3,,,,slope
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to  be  perpendicular,  a  line  must  have  negative  reciprocal  slope,
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m(2) = -1/m(1)
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in  this  case,,,m(2) =-1/3= (-1/3)
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