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  • The problem is y=\sqrt{15-x^4}. You must determine whether the formula determines y as a function of x.
  • Holy crap it's Ellen in the flesh. What brings you to Dallas?
  • I've always wanted to come here. What is your name and what do you do for a living?
  • I teach kids how to math all over the place and my name is Kinny
  • No flipping way, teach me something!
  • Okay, you're going to help me determine whether the formula determines y as an x value
  • Alright bet
  • How do I solve this?
  • If one does not know how graph the problem, begin by entering it into After the graph appears, see if it passes the vertical line test or not. This means that a vertical line cannot touch more than one point on the line at once. If it passes the test, it is a function.
  • So what was the case for this function?
  • When placed on the graph, it passed the vertical line test. So this means that yes, it is a function indeed. 
  • What an awesome product!!! Thanks for teaching me how to do math. 
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