tolong jawabannya nomer 4 sama 5 mohon bantuannya

5.) persamaan grs melalui ttk (7,2) dan sejajar 2x-5y=8
m1 = 2/5 karena sejajar m2 = 2/5
pers.grs:
y-y1 = m(x-x1)
y-2 = 2/5.(x-7)
5y-10 = 2x-14
2x-5y-4 = 0

4a. y - 4 = - 1/3 (x-0)
  y - 4 = -1/3 x
 y = -1/3 x +4
b. y + 2 = -4(x - 1)
  y +2 = -4x + 1
   y = -4x - 1
c. (y-4) / (6-4) = (x - 7)/(1-7)
  (y-4) / 2 = (x - 7) / -6
 -6y + 24 = 2x - 14
  2x + 6y -38 = 0
d. y = x -6
gradien = 1
y + 1 = 1(x + 2)
y = x + 1
e. titik (-3,1) sejajar sumbu x
  y = 1
f. sejajar sumbu y
x = 7
g. gradien 1 = (-2 + 4) / 0 + 5)
       = 2 / 5
gradien tegak lurunya = - 5/2
y - 1 = -5/2(x +2)
y - 1 = -5/2 x - 5
y = -5/2 x -4
2y = -5x -8
2y + 5x + 8 = 0

5. 2x - 5y = 8
 2x - 8 = 5y
 y = 2/5 x - 8/5
gradien = 2/5
y - 2 = 2/5 (x - 7)
y - 2 = 2/5 x - 14/5
y  = 2/5 x - 14/5 + 2
y = 2/5 x - 4/5
5y = 2x - 4