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(3,-6) -> x2 = 3 ; y2 = -6
(Disini saya akan menggunakan "per" dengan garis miring (/))
y-y1/y2-y1 = x-x1/x2-x1
y-4/-6-4 = x+2/3+2
y-4/-10 = x+2/5
(disini dikali silang)
5(y-4) = -10(x+2)
5y-20 = -10x-20
10x+5y-20+20 = 0
10x+5y = 0
a = 10 ; b = 5
m = -a/b = -10/5 = -2
Jadi, gradien dari titik (-2,4) & (3,-6) adalah : -2
= -6-4 / 3 -(-2)
= -10 / 5
= -2