Question

Find f-1(x). Sketch the graphs of y=f(x) and y=f-1(x) on the same coordinate axes. (Note: the -1 after the f, is up top where the exponent usually is):

Answer for: f(x)=3x-4

Please help. I'm lost.

Answer 1

If you are in like a beginner's level course, they want you to get a few values, like x=0, plug in 0 in f(x) and it will give you y.

Answer 2

This is college Algebra. I'm still lost though; it's been a long time.

Answer 3

Need to get credits for the military in order to get promoted; however I never use this stuff in my line of work. lol

Answer 4

Start finding one point. x=0, therefore y=3(0)-4

Answer 5

Can you pleas tell me what the little -1 is after F? This book is horrible which is why I have to get outside resources. I've even looked at purplemath.com so i got good resources.

Answer 6

Okay, I got that first part. You plugged the 0 into the 3X part.

Answer 7

I have a graphing calculator as well as an Algebra program that I can plug in graphs; however I really need to learn how it's done; not just get by.

Answer 8

The little -1 is called the inverse function. In this case set y=3x-4 and solve for x

Answer 9

When I want to enter the little inverse function into a graphing calculator however, how to do I even enter that?

Answer 10

x=y+4/3?

Answer 11

There is an inverse function\[x^{-1}\] but it is used for inverse of simple numbers may not work for an algebraic function. What they are asking is simple enough to do manually. Graph it only to double check your work.

Answer 12

Don't panic go to local community college. They have this thing called a math lab. Ask for a tutor. An hour a few times a week would work wonders.

Answer 13

I sure will. I just need to figure out these last two problems for the work is due today and I've been working so hard all week ...on each lesson...

Answer 14

And midterms this week too...wow..