Answer:
y = (1/2)x - 3
Let's take x = 1, 2, 3. Substitute x into y = (1/2)x - 3 to find out y.
x = 1 => y = (1/2)(1) - 3 = -5/2
x = 2 => y = (1/2)(2) - 3 = -2
x = 3 => y = (1/2)(3) - 3 = -3/2
=> 3 solutions are: (1, -5/2), (2, -2), and (3, -3/2)