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Verified answer
Y2 - y1---------
x2 - x1
= 1 - 5
---------
2 - (-3)
= -4/5
Garis tegak lurus
m1 × m2 = -1
-4/5 x m2 = -1
-4 m2 = -5
m2 = 5/4
semoga bermanfaat