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1.2x-y+4=0
=2x[0]-y+4=0
=y+4=0
y=4
2.2x-y+4=0
=2x-y[0]+4=0
2x+4=0
x=4/2
x=2
jadi garfiknyaa
[0,4]dan [2,0]
jadi jawabannya adalah A