caranya no 10?? mohon bantuannya.

Ax + By + c = 0
gradien / m = -A/B
I. m = -5/-1 = 5
II. m = -5/1 = -5
III. m = -5/2
IV. m = -5/1 = -5
gradien yg melalui titik
(x1,y1) = (2,1)
(x2,y2) = (3,6)
m = y2-y1 / x2-x1
= 6-1 / 3-2
= 5/1
= 5
jadi yg sama I
pilihan A