ka tolongggg pleaseee bantuu no3 yg b no4 yg A no5

3b) y = - 3x + 4
m = - 3
syarat tegak lurus
m1 . m2 = - 1
- 3 . m2 = - 1
m2 = ⅓
pers garis
y - y1 = m (x - x1)
y + 2 = ⅓ (x - 6)
y = ⅓ x - 2 - 2
y = ⅓ x - 4

4a) 4x + 2y - 3 = 0
2y = - 4x + 3
m = - 4/2
m = - 2
sejajar m1 = m2 = - 2
mencari ttk potong :
2x + 5y - 1 = 0
2x + 5y = 1 ... pers 1
x - 2y + 4 = 0
x - 2y = - 4 ... pers 2
maka pers1 & 2 dieliminasi atau subtitusi
2x + 5y = 1
x - 2y = - 4 |×2
2x + 5y = 1
2x - 4y = - 8
------------------(-)
9y = 9
y = 1
subtitusi y = 1 ke pers x - 2y = - 4
x - 2y = - 4
x - 2(1) = - 4
x - 2 = - 4
x = - 4 + 2
x = - 2
jadi ttk potong = (-2 , 1)
pers garis melalui ttk potong & m = - 2
y - y1 = m (x - x1)
y - 1 = - 2 (x + 2)
y = - 2x - 4 + 1
y = - 2x - 3
y + 2x + 3 = 0

5) x + 2y - 3 = 0
2y = - x + 3
m = - 1/2
syarat tegak lurus
m1 . m2 = - 1
- ½ . m2 = - 1
m2 = 2
mencari titik potong
x - 4y + 4 = 0
x - 4y = - 4 ..... pers 1
x + 3y - 10 = 0
x + 3y = 10 ... pers 2
pers 1 & 2 bisa dieliminasi atau subtitusi
x - 4y = - 4
x + 3y = 10
-----------------(-)
- 7y = - 14
y = 2
x - 4y = - 4
x - 4(2) = - 4
x - 8 = - 4
x = - 4 + 8
x = 4
ttk potong = (4,2)
pers garis melalui titik potong & m = 2
y - y1 = m (x - x1)
y - 2 = 2 (x - 4)
y = 2x - 8 + 2
y - 2x = - 6