Question

Tentukan persamaan garis lurus melalui (-1, 3) kemiringan -1

Answer 1

Y - 3 = -1 ( x -(-1)
y -3 = -1 ( x + 1)
y -3 = -x -1
  y  = -x - 1+3
  y  = -x +2

Answer 2

Y - y1 = m(x - x1)
y - 3 = -1(x + 1)
y - 3 = - x - 1
y + x - 3 + 1 = 0
y + x - 2 = 0