Question

Determine whether the relation in the table below is a function, and if so, write a function rule.
x y
-1 1
0 2
2 4
3 5

Answer 1

as long as the second numbers do not repeat, it is one to one

Answer 2

and as long as the first numbers do not repeat, it is a function

therefore this is a function, and it is also one to one

Answer 3

kay thanks a bunch!