Which graph has a domain of all real numbers?
On a coordinate plane, points are at (negative 4, negative 2), (negative 3, negative 1), (negative 2, 0), (negative 1, 1), (0, 2), (1, 3), (2, 4).
On a coordinate plane, a line goes through (negative 4, negative 1) and (0, negative 3).
On a coordinate plane, a vertical line is at x = 2.