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4x + 2y = 8 can be restated as 2y = -4x + 8 : y = -2x + 4 The equation is now in the standard form y = mx + c which is the equation of a straight line.

When establishing points to enable a straight line graph to be drawn, try to determine points that are a reasonable distance apart.

Start by taking x = 0 then y = 4

and when y = 0 then x = 2

As the two coordinates for x are closest to one another, choose the third point where x has a value of (say) -2 then y = 8.

The three points are thus (-2, 8) (0, 4) and (2, 0).

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Q: Graph 4x plus 2y equals 8 using three points?
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