gradien garis yg melalui titik a(6,5) dan b(9,-1) adalah... (tolong dong) ^_^

Diket :
x1 = 6
x2 = 9
y1 = 5
y2 = -1

Jawab :
m = y2-y1/x2-x1
m = -1-5/9-6
m = -6/3
m = -2

Maaf jika ada kesalahan :)

y2-y1/x2-x1=-1-5/9-6
=-6/3
= -2