SOLUTION: determine whether the equation defines y as a function of x y=x2 and x=y2

Question 763502: determine whether the equation defines y as a function of x
y=x2 and x=y2
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
Functions can only have one per .

is a function; works because it has two per
=> will be or ; it's not a function because has two per , which, for functions, is the rules
This will make sense if you graph and side by side.
Now try the "vertical line test".

as you can see, the vertical line intersects in two points
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