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m=2
y-y1=m(x-x1)
y-1=2(x-4)
y=2x-7
persamaannya yaitu : 2x-y+7=0
jangan lupa ***** yah!!! oke
gradiennya 2
garis sejajar memiliki gradien sama, maka m=2
y-y1 = m(x-x1)
y-1 = 2(x-4)
y-1 = 2x-8
y = 2x-8+1
y = 2x-7