Question

Need help with functions. Problem: Gerri made a function machine. Find the rule for Gerri's function machine.
-1 Goes in -1 Comes Out. What functions went on?

Answer 1

Functions look like, in general, y = f(x). x is your independent variable and y is the dependent variable. That' for starters.

Answer 2

Yes, I undersand that.

Answer 3

Ok, now, f(x) = something. You put in -1 and got back -1. So, generalizing, what you put in is what you get out. So, if we go back to f(x) = something, what is something?

Answer 4

-1? I still don't understand. I'm sorry it just isn't clicking.

Answer 5

np. It's probably because it's too obvious. That happens with everyone from time to time. x went in and x came out. So, f(x) = x.

Answer 6

So, y= x.

Answer 7

Oh, I got it! Thank you.

Answer 8

you're welcome.