Question

Fan and Medal!
Can someone explain how to solve this?
http://prntscr.com/6l9oc1

Answer 1

an inverse ...

Answer 2

let solve for x

Answer 3

y = (3x-4)/5

how would we get x all by itself?

Answer 4

Would you multiply y by 5 first?

Answer 5

yep

5y = 3x-4

keep going

Answer 6

5y + 4 = 3x
x = (5y + 4) / 3

Answer 7

thatll do it

Answer 8

I haven't learned about inverse functions yet. I don't really know what they are.

Answer 9

oops I changed it to y midway. Lol

Answer 10

an inverse function ..

if f(x) and g(x) are inverse function then f(g(x)) = x

an inverse function just undoes what the other one did

Answer 11

if you can solve y = f(x) in terms of x, then f^(-1) (y) = x

Answer 12

so.. f(x) = (7x - 1) / 2

Answer 13

Would that be f(x) = (2x + 1) / 7

Answer 14

f^-1(x) I mean

Answer 15

2y = 7x-1 ... yep thats good

Answer 16

Huh, thanks for teaching me. Helps a lot xD

Answer 17

youre welcome :)