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Writing Equations of Perpendicular Lines

Writing Equations of Perpendicular Lines 1.8 - Solution

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a

Parallel lines have the same slopes which means that they have the same slope. The slope is determine by the coefficient in front of the -term. Thus, will make the lines parallel.

b
If the lines are perpendicular, the product of their slopes will be equal to Thus, we can find that value of by solving where is and is the slope of the line

The slope must be equal to if the lines are perpendicular.