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anonymous

  • 5 years ago

Which is not a function? Is the relation y^2+5x=8 a function? Explain.

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  1. amistre64
    • 5 years ago
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    in the standard definition; No

  2. amistre64
    • 5 years ago
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    if y axis is up and xaxis is left; this aint a function

  3. anonymous
    • 5 years ago
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    The graph of a function can never cut the y-axis in two places. As this contans y to the powewr 2 it implies that the graph will cut in two places the y-axis. Hence not a function.

  4. amistre64
    • 5 years ago
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    it can cut the y axis twice; there is no reason to suggest that y is not the input and x the output; it is only by convention that x is left and right, while y is up and down

  5. anonymous
    • 5 years ago
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    Run a vertical line across athe graph of a function and it will only hit the graph in one place at a time, fact.

  6. amistre64
    • 5 years ago
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    thats not a fact, its a convention; replace x and y with r and t, then what?

  7. anonymous
    • 5 years ago
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    Amistre, have you been here all day?

  8. amistre64
    • 5 years ago
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    just got back on actually ;)

  9. anonymous
    • 5 years ago
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    I take your point, it is a little pedantic but the conventions of x-axis and y-axis as we both understand them allows my answer to hold.

  10. amistre64
    • 5 years ago
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    it does :) and it is lol

  11. anonymous
    • 5 years ago
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    Which country are you operating from?

  12. amistre64
    • 5 years ago
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    y^2+5x=8 x = (-y^2 +8)/2 is a function the other way it is not ....

  13. amistre64
    • 5 years ago
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    usa, florida

  14. amistre64
    • 5 years ago
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    ..../5

  15. anonymous
    • 5 years ago
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    OK, France and here it is way past the time for bed so bonsoiree my friend

  16. amistre64
    • 5 years ago
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    Ciao ;)

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