SOLUTION: 2x2 + y2 = 1 y = 7x4 x = 3y2 y = 2x + 1 Which of these are functions?

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Question 741343: 2x2 + y2 = 1
y = 7x4
x = 3y2
y = 2x + 1
Which of these are functions?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
2x2 + y2 = 1::::: no
y = 7x^4::::::::: yes
x = 3y^2::::::::: no
y = 2x + 1::::::: yes
Which of these are functions?
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Cheers,
Stan H.
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