Question

How can i prove that y squared equals two X is a function

Answer 1

is it
one-to-one,
and
onto

Answer 2

what do you mean by that

Answer 3

does each point in the domain correspond to exactly one point in the co-domain .
if so; the function is one-to-one

Answer 4

so would have have to graph the equation to find out if it is a one-to-one