Question 140369
Which of these formulas implicitly describes y as a function of x? 
a) 2x+y^3=100
y = cube root of (-2x+100)
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b) 5x-|y|=10
Requires two equations:
y = 5x-10 or y = -5x+10
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c) x^2+y^2=25
Is not a function as there are two values of y for each value of x.
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Ans: a
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Cheers,
Stan H.