Make a table of values for the equation.
y = 3x + 2

Tables are easy to make when u have the equation. Just simply sub any number in for x and solve for y

y = 3x + 2...lets let x = 0
y = 3(0) + 2
y = 2so when x = 0, y = 2(0,2)

y = 3x + 2lets let x = 1
y = 3(1) + 2
y = 3 + 2
y = 5so when x = 1, y = 5(1,5)

y = 3x + 2let x = 2
y = 3(2) + 2
y = 6 + 2
y = 8so when x = 2, y = 8...(2,8)

u can find more point if u need to...

now make a table..

         x            y
        0             2
        1             5
        2             8
and like I said, if u need more numbers for ur table, just do like I did above :)