### Home > A2C > Chapter 8 > Lesson 8.1.4 > Problem 8-72

8-72.

While working on their homework on sequences, Davis was suddenly stumped!

“*This problem doesn't make sense!*” he exclaimed. Tess was working on her homework as well.

“*What's the problem*?” she asked.

“*This problem is about a SEQUENCE, *

*, but it is asking whether or not it is a function. How can a sequence be a function*?”

“

*Well of course a sequence is a function!*” said Tess.

Who is right? Should Davis be confused, or is Tess correct? Explain completely.

Does the sequence have any *x*-values for which there is more than one *y*-value?