Question

Which shows solutions to x + 3y = 7 if x and y must be whole numbers.
(Points : 4)
{(0, 5), (1, 3), (2, 1)}
{(2, 1), (1, 4), (0, 7)}
{(1, 2), (4, 1), (7, 0)}
{(0, 5), (1, 4), (2, 1)}