Question

If f(x)=3x-8 then
a) f^-1(y)=?
b)f^-1(6)=?

Answer 1

y=3x-8
Interchange the x and y
x=3y-8
Now solve for y
x+8=3y
y=1/3x+8/3

Answer 2

Now plug in 6 for y=2+8/3
y=14/3

Answer 3

Mertsj how can i get x by itself?

Answer 4

What equation are you referring to?

Answer 5

1st one

Answer 6

f(x)=3x-8?

Answer 7

the y=1/3x+8/3

Answer 8

Multiply both sides by 3 first of all.

Answer 9

That gives you: 3y=x+8
Now subtract 8 from both sides and you will have x by itself.

Answer 10

thanks!

Answer 11

yw