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m= (-5-3)/(-2-4) = -8/-6 = 4/3
garis sejajar melalui (-2, 1) adalah
y = m ( x -x1) +y1
y = 4/3 (x +2) + 1
3y = 4(x+2) + 3
3y = 4x +8+3
3y = 4x + 11
4x -3y + 11 = 0
y-b=m(x-a)
y-1=4/3(x-(-2))
y-1=4/3x+8/3
y=4/3x+11/3
3y=3x+11
atau 3y-3x-11=0