Question

PLEASE HELP!
What is the inverse to the given relation?
y = 3x + 12


I have NO idea how to do this. Can someone please set this up for me? I can solve with help! please!

Answer 1

y=3x+12

Switch x and y.

Answer 2

What? x=3y+12?

Answer 3

Yeah. Switch the variables, and basically resolve for y. Make sense?

Answer 4

@PrincessTianaB

Answer 5

I don't even know how to do that... I am 18, and was in the hospital for an illness I had for almost 3 years while I should've been in school.. I am just learning how to do all of this. I have no idea.

Answer 6

I'm so sorry to hear that, it's ok. We'll start from scratch.

Answer 7

Oh no! Nothing to be sorry about, I was just explaining that I literally know none of this! But okay, great! That's what I need!

Answer 8

So, you did switch the variables correctly.

x=3y+12

To solve for y again, like in any normal solve for variable equation.

You must isolate the term of y.

3y=x-12

Here, you subtracted the 12.

Answer 9

Making sense so far?

Answer 10

Yes! So that made the 12, negative?

Answer 11

x=3y+12
-12 -12

x-12=3y

or

3y=x-12

Answer 12

good so far?

Answer 13

Yes! Made much sense!

Answer 14

Good! Now, there is one more step.

3y=x-12

Y has be alone, and you can do that by dividing by 3.

Answer 15

Wanna give me your final inversed equation?

Answer 16

So y=x-4 ?

Answer 17

Hmm, no.

If the equation was 3y=-12
y=-4

However there is a x here.

Answer 18

\[y=\frac{ x-12 }{ 3 }\]

Answer 19

You literally just put it as a fraction ^^

Answer 20

That is the final inverse for your function :)

Answer 21

Wait, that's literally it? I was trying to think way to deep into that! Lol. Thank you so much!

Answer 22

No problem. Feel free to fan me so you can see when I'm online. Your welcome to tag me into any more questions :)

Answer 23

I fanned you and actually am about to post another question, my last one for the night if you don't mind helping! Ill tag you in it! (: