Question

Tolong kerjakan nomer 2,3,4,5,8
mohon

Answer 1

2. kemiringannya = (4 -(-13) / ( 15 -(-6)
               = (4+13) / (15+6)
               = 17 / 21
3a.  kemiringan = (3-(-5)) / ( 4 -(-2)
               = 8 / 6
               = 4/3
 b. kemiringan = (-3-(-1) / (7 -(-1)
                 = -2 / 8
                 = -1/4
4a. y +4 = 3(x-0)
   y + 4 = 3x
   y = 3x - 4
 b. y - 2 = 1 1/2(x-1)
  y - 2 = 3/2 (x - 1)
  y -2 = 3/2 x - 3/2
  y = 3/2 x + 1/2
2y = 3x + 1
c. y - 1 = 4(x+2)
  y - 1 = 4x + 8
  y = 4x + 9
d. (y -(-1) / (4 -(-1) = (x - 2)/(1-2)
  (y + 1) /5 = (x -2) / -1
  - y - 1 = 5x -10
  5x + y - 9 = 0
e. (y-0)/(-8-0) = (x +1)/ (3+1)
  y / -8 = (x+1) / 4
4y = -8x -8
 y = -2x - 2
y + 2x + 2 = 0

5a. gradien PQ = (2-0)/(0-5)
   = 2/-5
  = -2/5
garis l adalah
y - 4 = -2/5(x-3)
y - 4 = -2/5 x + 6/5
y = -2/5 x  + 26/5
5y = -2x + 26
b(i).  y - 4 = 2(x -3)
y -4 = 2x -6
y = 2x - 2
(ii) koordinat S dengan memotong sumbu y (x=0)
y = 2(0) - 2
y = -2
titik S (0, -2)

8. a garis l
(y - 3) / (5-3) = (x +1)/(0+1)
(y-3) / 2 = (x+1) / 1
y - 3 -= 2x +2
y = 2x +5
b. garis k
(y - 3) / (2-3) = (x +1) / (0 + 1)
 (y-3) / -1 = (x+1) / 1
y - 3 = -x -1
y = -x +2