itu yang 2b garis y= -1/2x + 3 ya bantu yang 2 a,b 3 a, b pliss dikumpulin besok soalnya:( pake cara ya pliss makasih hehe

Bab Persamaan Garis
Matematika SMP Kelas VIII

y = ax + b, sejajar, (p, q)
y = ax - ap + q

2a] y = 3x - 1, sejajar, (-1, 2)
      y = 3x - 3 . (-1) + 2
      y = 3x + 3 + 2
      y = 3x + 5

2b] y = (-1/2) x + 3, sejajar, (-1, 2)
      y = (-1/2) x - (-1/2) . (-1) + 2
      y = (-1/2) x - (1/2) + 4/2
      y = (-1/2) x + (3/2)

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ax + by + c = 0, tegak lurus, (p, q)
bx - ax - (bp - aq) = 0

3a] y - 2x + 3 = 0, tegak lurus, (2, 0)
     -2x - y - (-2 . 2 - 1 . 0) = 0
     -2x - y - (-4 - 0) = 0
     -2x - y + 4 = 0
     2x + y - 4 = 0

3b] 3x + 2y - 4 = 0, tegak lurus, (-3, -1)
      2x - 3y - (2 . (-3) - 3 . (-1)) = 0
      2x - 3y - (-6 + 3) = 0
      2x - 3y - (-3) = 0
      2x - 3y + 3 = 0