anonymous
  • anonymous
In a formula how do determine if y is a function of x? y=x^2+or-3
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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zepdrix
  • zepdrix
Hmm I think if we have a \(\large \pm\) in our equation, it's always going to fail the vertical line test. I could be wrong though, I'd have to try and think of an example. \[\Large y=x^2\pm3\] This function equals\[\Large y=x^2+3 \qquad\text{and}\qquad y=x^2-3\]
zepdrix
  • zepdrix
https://www.desmos.com/calculator/gc28rtnd73
zepdrix
  • zepdrix
If you check out the link I provided, you can see both parts of the function graphed. This one would fail the vertical line test, right? :o

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anonymous
  • anonymous
So if it fails the vertical line test then it can't be a function?
zepdrix
  • zepdrix
then y can't be a function of x, correct :)
anonymous
  • anonymous
Thanks!

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