Kemiringan garis yg melalui titik (1,5)dan (2,9) adalah.. a.4 b.3 c.-3 d.-4

gradien garis =(y2-y1)/(x2-x1)
y2 = 9
y1 = 5
x2 = 2
x1 = 1
gradien garis = (9-5)/(2-1) = 4/1 = 4

jawabannya a. 4