Question 515319
You cannot divide by 0.  Doing so is 'undefined'.
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So any value of 'y' that would make the denominator = 0 cannot be allowed.
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(18)/(11y) is undefined if
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11y = 0
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That only happens when y = 0
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So, 'y' can take on any value from -infinity to +infinity, except for 0.
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{{{ graph(500,500,-10,10,-10,10,18/(11*x)) }}}