With pointslope form, you can quickly plug in an x or y value and get your needed output. It's like magic. You go, you math magician you.

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SlopeIntercept Form 
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Linear Equations in Standard Form 
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Linear Equations 
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Intercepts 
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Interceptar 
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Linear Equations in PointSlope Form 
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Slope (Problem) 
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Slopes of Parallel and Perpendicular Lines