jawab dong nomer yang bisa aja makasih

4a) y = 2x
m = 2
tegak lurus
m1 . m2 = - 1
2 . m2 = - 1
m2 = - ½
pers garis
y - y1 = m (x - X1)
y + 5 = - ½ (x - 2)
y = - ½ x + 1 - 5
y = - ½ x - 4

b) y = ⅔ x + 3
m = ⅔
tegak lurus
m2 = - 1 / ⅔ = - ³/2
pers garis
y + 5 = - 3/2 (x - 2)
y = - ³/2 x + 3 - 5
y = - ³/2 x - 2

c) 4x - 3y - 9 = 0
- 3y = - 4x + 9
m = - 4/ - 3 = ⁴/3
tegak lurus
m2 = - 1 / ⁴/3 = ¾
pers garis
y + 5 = ¾ (x - 2)
y = ¾ x - ³/2 - 5
y = ¾ x - 13/2