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Find the equation for the horizontal line passing through the point (-6,-6).

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SOLUTION

We are trying to get the equation for the horizontal line passing through the point (-6,-6).​

( x1 , y 1 ) = ( 0, 0 )

( x2 , y2 ) = ( -6 , -6 )

Gradient, m = ( y2 - y1 ) / ( x2 - x1 )

m = ( -6 -0 ) / ( -6 - 0 )

m = -6 / - 6

m = 1

Then, using the equation of a line;

y - y 1 = m ( x - x 1 )

y - 0 = 1 ( x - 0 )

y = x

User Neil Mitchell
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