consider this line 9x-4y=-9

Algebra
Tutor: None Selected Time limit: 1 Day

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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