Question

y=ax+b find the inverse and determine wether it's a function

Answer 1

usually you swap y and x then solve for the new variable.

y=ax+b
x=ay+b

Solve for y :D

Answer 2

x-b over a=y but is it a function

Answer 3

y = (x-b)/a

Answer 4

Yes

Answer 5

Well I can tell you it is a function since the inverse of a linear function is usually a linear function too so it is a function :P

Answer 6

Take this new y function and put it in for x in the original equation you should get x back if this is an inverse

Answer 7

If an equation has an inverse then it's a function

Answer 8

Is y=2 a function or x=9/y a function

Answer 9

Try it. Y=2 exchange x and y

Answer 10

Then take the result and put in for x

Answer 11

Do you get x back?

Answer 12

What? No x? That should be a clue

Answer 13

http://m.wolframalpha.com/input/?i=inverse+of+y%3D2&x=12&y=8

Answer 14

Does this make sense?

Answer 15

Your second one has an inverse.

Answer 16

The reason an inverse is a function is because it is bijective. http://en.wikipedia.org/wiki/Function_(mathematics)#Injective_and_surjective_functions