consider this line 9x-4y=-9

label Algebra
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find equation of the line that is parallel to this line and also find equation that is perpendicular  to this line and passes through the point (1,1).

Sep 26th, 2015

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9x-4y=-9

-4y=-9x-9
y=9/4x +9/4
the gradient=9/4
parrallel have equal gradients
(y-1)/(x-1)=9/4
y-1=9/4(x-1)
y=9/4x-9/4+1
y=9/4x-5/4
perpendicular
gradient=-4/9
(y-1)/(x-1)=-4/9
y-1=-4/9(x-1)
y=-4/9x+4/9+1
y=-4/9x+13/9

 

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Sep 26th, 2015

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Sep 26th, 2015
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Sep 26th, 2015
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