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m = y2-y1 / x2-x1 = -3/9 = -1/3, tegak lurus = 3
3 ( x + 2 ) = y + 4
3x + 6 = y + 4
3x - y + 2 = 0
Gradienpq = 3-6 / 4-(-5)
= -3 / 9
= -1/3
Gradien1 = 3
y-y1=m(x-x1)
y-(-4)=3(x+2)
y+4 = 3x+6
3x+y+4-6=0
3x+y-2=0