### Home > CALC > Chapter 8 > Lesson 8.2.2 > Problem 8-82

8-82.

**Multiple Choice:**If*x*^{2}− 2*xy*= 8, then when*x*= 2,= Homework Help ✎ −

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the derivative might have both *x* and *y* variables in it.

So be prepared for the final step: you will need to know what *y*-variable corresponds with *x* = 2 on the given graph.