Question 522935
x + 2y = 0
2y = -x
y = -x/2 = -(1/2)x
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when x=0, y = 0, which defines the point (0,0).
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when x=-4, y = -(1/2)(-4) = 2, which defines the point (=4,2)
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with two points you can draw a line
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{{{ graph(500,500,-5,5,-5,5,-x/2) }}}