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-2y= 3x+7
y= 3x+7
---------
2
maka gradien = -3/2
3. y=5x-10
gradien= 5
1. {1,0} dan {-2,1}
m= y2-y1
---------
x2-x1
m= 1-0
-----
-2-1
m= - 1/3