SOLUTION: for which of the following equations is y a function of x? a) x=y b) x=[y] c) x=y² d) x=[y²-y] * - [] - mean absolute value bars

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Question 825254: for which of the following equations is y a function of x?
a) x=y b) x=[y]

c) x=y² d) x=[y²-y]
* - [] - mean absolute value bars

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
for which of the following equations is y a function of x?
a) x=y
yes
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b) x=[y]
Since (1,1) and (1,-1) are possible, it is not a function.
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c) x=y²
Since (1,1) and (1,-1) are possible, it is not a function.
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d) x=[y²-y]
x = y^2-y or x = y-y^2
not a function and not a function
The 1st is a parabola opening to the right so it has 2 y-values for
each x value in its domain except at the vertex.
The same is true for the 2nd parabola which opens to the left.
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Cheers,
Stan H.