Question

What is the inverse of the given function?

y = 3x + 9

Answer 1

I subtract 9 from each side and get y-9=3x divide by 3 on each side, y-9/3=x now what?

Answer 2

Or am i just totally wrong?

Answer 3

@agent0smith

Answer 4

Now y and x change roles. Put y for x and x for y.

Answer 5

I mean the inverse becomes y= (x-9)/3

Answer 6

inverse of y= (x-9)/3

Answer 7

I'll give ya another example. Let y = 2x-2

y+2=2x then (y+2)/2 = x This means

Inverse of y = (x+2)/2

Answer 8

Another one . y= (x+2)/2
2y=x+2 then 2y-2 =x This means

Invserse of y = 2x-2

Answer 9

but y=(x-9)/3 isnt any of my answer choices

Answer 10

A. y= 3x-3
B. y = 1/3x + 3
C. y=3x+3

Answer 11

Make sure to use parentheses. y-9/3=x and (y-9)/3 = x are not the same thing.

Answer 12

y=(x-9)/3 = x/3 - 9/3 = x/3 -3 (B)

Answer 13

\[y=\frac{ x-9 }{ 3 } = \frac{ x }{ 3 } - \frac{ 9 }{ 3 } = \frac{ x }{ 3} -3 \]

Answer 14

lol haha cx stupid parentheses cx okay ,,how is it b?

Answer 15

\[y=\frac{ x }{ 3 } -3 = \frac{ 1 }{ 3 } x - 3 \]

Answer 16

be had is y= 1/3x+3 not -3

Answer 17

has *

Answer 18

Oh! Is there a D ?

Answer 19

Yeah but its not right

Answer 20

What is not right?

Answer 21

D is not right its wrong

Answer 22

Im guessing they just messed up with the answer choices :P so imma go with b :) thanks

Answer 23

I beleive so. What we find seems quite right :)