tentukanlah gradien persamaan garis berikut : a.y=x+4 b. y=-3x+2 c. x+y=-5 d.3x-y+6=0 e.2/3x+3y+9=0

jawab

gradien garis 
y = mx + c 
m= gradien garis

a. y = x + 4 --> m = 1
b. y = - 3x + 2 --> m  = -3
c. x + y = -5 --> y = -x - 5 --> m = -1
d. 3x - y + 6 = 0 --> -y = - 3x  -6 --> m  =-3/-1 = 3
e. 2/3x + 3y + 9 = 0 --> 3y = - 2/3 x - 9 --> m = (-2/3)/(3) = -2/9