9514 1404 393
Answer:
A, D, E . . . not a function
B, C . . . a function
Step-by-step explanation:
Look at the lists of first numbers:
{2, 3, 5, 2} . . . 2 is repeated, not a function
{3, -3, 0, 5} . . . no repeats, is a function
{1, 2, 3, 4} . . . no repeats, is a function
{4, 6, 8, 4} . . . 4 is repeated, not a function
{2, 2, 2, 2} . . . 2 is repeated, not a function
