Question 71033
X-2Y=10
-2Y=-X+10
Y=-X/-2+10/-2
Y=X/2-5
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2X+Y=2
Y=-2X+2
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{{{ graph( 300, 200, -6, 5, -10, 10, y = x/2 -5, y = -2x +2) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = x/2 -5 and y = -2x+2).
checking the two lines ploted I'd say they are neither parallel nor perpendicular.