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find the equation of aline through (-4,7) perpendicular to the y-axis

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equation of a straight line

perpendicular-lines
equation-of-a-line

asked Dec 3, 2013 in GEOMETRY by johnkelly Apprentice

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1 Answer

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Required line perpendiculr to Y axis.

Slope of Y axis is undefined.

X axis is perpendicular to Y axis.

Slope of the X axis is 0.

So m =0

Given point say (x1,y1) = (-4,7)

Equation to line y-y1 = m(x-x1)

y-7 =0(x+4)

y-7 = 0

Add 7 to each side.

y-7+7 = 0+7

Required line equation is y = 7

answered Dec 3, 2013 by william Mentor

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