Question 89665
For each x value there is one y; for each y value there is one x
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Example: y = 3x+4 is one-to-one;its graph is a line
Example: y = x^2 is NOT one-to-one; its graph is a parabola where
certain y values are related to two different x values: (1,1) (-1,1)
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Cheers,
Stan H.