## GOODMAN 3 years ago Can someone show me how to do this? Find the inverse of {(3, 2), (4,2)} and tell whether its a function.

1. Mertsj

Just reverse the x and y values in the ordered pairs. Then check if any of the ordered pairs have the same first number. If they do, it's not a function.

2. GOODMAN

so all you need to do is reverse x and y? what will happen if you have 3 ordered pairs? would you do the same?

3. Mertsj

Yep. You would do the same. Is the inverse a function or not?

4. GOODMAN

yea..i dont know how to determine whether its a function or not..do you mind explaining?

5. Mertsj

Did you read what I wrote in my first post?

6. GOODMAN

OHHHH...OKAY i understand..so its not a fucntion

7. Mertsj

Right. The inverse is NOT a function.

8. Mertsj

At least in this case. Sometimes it will be.

9. GOODMAN

because 2 is repeated..

10. GOODMAN

does this rule apply to all functions?

11. Mertsj

Yes. The 2 is paired with more than 1 y value

12. Mertsj

Absolutely. learn these lessons about functions well because you will be involved with functions for as long as you study math.

13. GOODMAN

okay..thanks you really cleared up the functions for me :D

14. Mertsj

yw. isn't learning fun!!!

15. GOODMAN

it sure is!!