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=4-2 / -1-3
= -2/-4 = 1/2
krn tegak lurus maka
m1 x m2 = -1
1/2 x m2 = -1
m2 = -2
persamaan garis :
y-y1 = m (x-x1)
y-2 = -2 (x-3)
y-2 = -2x + 6
y = -2x +6+2
y = -2x + 8
atau
2x + y - 8 = 0
semoga membantu(: