Which relation is a function of x? {(1, 2), (7, 6), (3, 2), (1, 0), (5, 6)}
A 2-column table with 4 rows. Column 1 is labeled x with entries 0, 0, 0, 0. Column 2 is labeled y with entries 2, negative 6, 9, negative 7.
x = 3 y squared minus 7
On a coordinate plane, a graph curves up, then curves down, and then curves up again.