SOLUTION: Which equations below represent y as a FUNCTION of x? x+y=1 y^3+x^2=2 x^2-y=0 x^2+y^2=5 y+y^2+x=1

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Question 96224: Which equations below represent y as a FUNCTION of x?
x+y=1 y^3+x^2=2
x^2-y=0
x^2+y^2=5
y+y^2+x=1
Answer by tutorcecilia(2144) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=1 and x^2-y=0
.
x+y=1 because it passes the "vertical line test"
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+-x%2B1%29+
.
and
x^2-y=0 because it also passes the "vertical line test"
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+-x%5E2%29+