Question 531711
x +4y = 8
4y = -x +8
y = -(1/4)x +2
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x = 0, y = 2:  (0,2)
x = 4, y = 1:  (4,1)
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With two points you can draw a line.
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{{{ graph(500,500,-5,10,-5,5,-1/4*x+2) }}}