Question 761595
Using y2 - y1/x2 - x1 to find the gradient
      1 - 2/5 -(-2)
        -1/7
Using y - b = m(x - a) with F (5,1)
      y - 1 = -1/7(x - 5)
      y - 1 = -1/7x + 5/7
          y = -1/7x + 5/7 + 7/7
         = y = -1/7x + 12/7
OR
         = 7y = -x + 12
Hope this helps.
:-)