Answer:
x y
7 4
2 3
7 5
Step-by-step explanation:
it cant be a function if it has two of the same domains.
x values: 2 4 2
y values: 4 6 8
For every input (x), there is ONLY one output (y). So if 2 has an input of 4 and 6, it would not be a function.
