tentukan gradien garisnya a.persamaan garis a adalah. 7y=3-42x b.persamaan garis b adalah 5x -6y =30 c. garis c melalui titik (8, -3)dan (5,-2) d. garis d melal

a) 7y = 3 - 42x
y = - 6x + 3/7
m = - 6

b) 5x - 6y = 30
- 6y = - 5x + 30
y = 5/6 x - 5
m = 5/6

c) (y + 3) / (-2 + 3) = (x - 8) / (5 - 8)
(y + 3) / 1 = (x - 8) / (-3)
(-3) (y + 3) = 1 (x - 8)
- 3y - 9 = x - 8
- 3y = x - 8 + 9
- 3y = x + 1

d) (y - 5) / (5 - 5) = (x + 2) / (4 + 2)
(y - 5) / 0 = (x + 2) / 6
6(y - 5) = x + 2
6y - 30 = x + 2
6y = x + 2 + 30
6y = x + 32