Question 116460
HOPE THESE EXPLANATIONS OF FINDING 2 POINTS & THEN DRAWING A LINE HELPS!!!!
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Y=X-4 (RED LINE) 
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IF YOU SET X=0 THEN Y=0-4 OR Y=-4 (0,-4)
SET Y=0 THEN 0=X-4 OR X=4 (4,0)
NOW YOU HAVE 2 POINTS TO DRAW A LINE THROUGH WITH A SLOPE (m)=1
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2Y=-X+10 OR Y=-X/2+10/2 OR Y=-X/2+5 (GREEN LINE)
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AGAIN SET X=0 Y=-0/2+5 OR Y=5 (0,5)
SETY=0 0=-X/2+5 -X/2=-5 OR X=-5*-2 OR X=10 (10,0)
NOW DRAW A LINE THROUGH THESE 2 POINTS WITH A SLOPE(m)=-1/2
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{{{ graph( 300, 300, -6, 12, -10, 10, y = x -4, y = -x/2 +5) }}} (graph 300x300 pixels, x from -6 to 12, y from -10 to 10, of TWO functions y = x -4 and y = -x/2 +5). 
(6,2) looks like a solution for these two lines.