Question 761984
Gradient = y2 - y1/x2 - x1 = -1 - 0/0 - 2 = 1/2
Using y - b = m(x - a) m = gradient.
      = y - 0 = 1/2(x - 2)
        = 2y = x - 2    
        = y = 1/2x - 1
Hope this helps.
:-)