Which is the graph of f(x) = StartRoot x EndRoot? On a coordinate plane, a parabola opens up with a vertex at (0, 0). On a coordinate plane, an absolute value graph starts at (0, 0) and goes up through (2, 4). On a coordinate plane, a parabola opens to the right with a vertex at (0, 0). On a coordinate plane, an absolute value graph starts at (0, 0) and goes up through (4, 2).