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Re-Writing Equations Part of quiz @ end of class

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4x + 2y = 6 If an equation is not in slope-intercept form, we must first solve the equation for y. 1)Add or subtract 2)Multiply or divide

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Y = 3 – 2x How do we identify the slope? How do we identify the y-intercept?

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4y + 12x = 16

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25x – 5y = 30

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Slope Positive/Negative/Zero/Undefined

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Positive/Negative Slope Positive – Goes up from the left to the right. – Negative – Goes down from left to right –

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Horizontal Think “hoy” – “h” – horizontal line – “o” – zero slope – “y” – equation is of the form y =

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Undefined Think “vunx” – “v” – vertical line – “un” – undefined slope – “x” – equation is of the form x =

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5.1 Equations of Lines Equations of the form ax + by = c are called linear equations in two variables. x y 2 -2 This is the graph of the equation 2x +

5.1 Equations of Lines Equations of the form ax + by = c are called linear equations in two variables. x y 2 -2 This is the graph of the equation 2x +

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