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y1 = -3
x1 = 2
m = -2/-3 = 2/3
y-y1 = m(x-x1)
y-(-3) = 2/3(x-2)
y+3 = 2/3(x-2)
untuk menghilangkan 2/3 menjadi bilangan non-pecahan, kita kalikan 3 kecuali bilangan di dalam kurung
3y+9 = 2(x-2)
3y+9 = 2x - 4
3y - 2x = -9-4
3y - 2x = - 13
semoga bisa membantu