**What's
the function?**

How many functions can you think of that take 2 to 8?

**Approaches**

What does "take to" mean?

respond:If input value is 2, output value is 8. Or

f(2) = 8.

*f*(x) = *x* + 6

*f*(x) = 4*x*

*f*(x) = 8

*f*(x) = 16/*x*

*f*(x) = 2*x*^2

f(x) = 2(*x* + 1) + 2

*f*(*v*) = 8cos((pi)*v*)

*f*(x) = 2^(*x* + 1)

How are these alike? How are their graphs alike?

**Your
experience**

Have you used this problem with a class and seen approaches other than(or more specific than) those mentioned above? Or do you have other comments or criticisms or stories? If so, please tell us!

*Last updated 30 November, 2004*