1. Tentukan persamaan garis melalui titik (-2,1) dg garis y = 2x+3 2. Tentukan persamaan garis yg sejajar dg 4x - y = 12 dan melalui titik (3,2) 3. Tentukan pen

1) y = 2x + 3
m = 2
pers garis
y - y1 = m ( x - x1 )
y - 1 = 2 ( x + 2 )
y = 2x + 4 + 1
y = 2x + 5

2) 4x - y = 12
- y = - 4x + 12
m = -4/-1
m = 4
pers garis
y - y1 = m ( x - x1 )
y - 2 = 4 ( x - 3 )
y = 4x - 12 + 2
y = 4x - 10

3) 6x - 8y = 2x + 16
6x - 2x = 8y + 16
4x = 8y + 16
x = 2y + 4

4) 5x - 3y = 15
- 3y = - 5x + 15
m = -5/-3
m = 5/3