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graph an equation

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What this equation is saying is that no matter what the value of y is in the ordered pair (x, y), the value of x is 4.  Therefore, if you graph the points (4, 0),  (4, 3) and (4, 5),  or any point with the x-coordinate 0, we will have a vertical line.  It's always best to use at least 3 points to make sure we have a straight line in a linear equation.

i hope this helps.

Kevin

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