tolong di jawab donk butuh bngt mudah mudahan rezekinya lancar tolong kalo ada yang pake cara di tulis caranya

6) pernyataan yg salah yg ( C )
seharusnya :
y = 5 - 3x
m = - 3 bkn 5

8) m = ( y2 - y1 ) / ( x2 - x1 )
m = ( 6 + 8 ) / ( 3 - 10 )
m = 14 / - 7
m = - 2
gradien saling tegak lurus
m1 . m2 = - 1
- 2 . m2 = - 1
m2 = ½ ( B )

9) D
pembuktian :
3y + x + 3 = 0
3y = - x - 3
m = - 1/3

10) 3x - 2y + 5 = 0
- 2y = - 3x - 5
m = -3/-2
m = 3/2
gradien saling sejajar
m1 = m2 = 3/2
pers garis
y - y1 = m ( x - x1 )
y - 0 = 3/2 ( x - 0)
y = 3/2 x ( A )

11) m = ( y2 - y1 ) / ( x2 - x1 )
m = ( 3 + 6 ) / ( - 3 - 2)
m = 9 / - 5
m = - 9/5
gradien saling tegak lurus
m1 . m2 = - 1
- 9/5 . m2 = - 1
m2 = - 1 ÷ - 9/5
m2 = 5/9 ( C )