Question

The graph of a function h is given.

(a) Find h(-1).

h(-1) = ?

(b) Find the domain and range of h.
Domain = [-3,4]
Range = [-1,4]

Having trouble with part A of the question. Please help!

Answer 1

What's the function?

Answer 2

When you're going to find the inverse of a function simply substitute y by x. If it's (1,2), it becomes (2,1). Get it?

Answer 3

Just plug in -1 where ever there is a h, in your given function.

Answer 4

Oh is it h^(-1) or h(-1) >_>

Answer 5

If it's h^(-1), what I said was correct. If it really is h(-1), just substitute h by -1 and solve from there.

Answer 6

I can't attach a picture of the graph on here can I? The question is on web assign and I can't find it anywhere in my book.

Answer 7

Wait, are you doing Keystone Online High School Algebra 1? If so, so am I, and you probably can attach the graph, just screenshot it and hit 'attach file', or maybe 'draw'.

Answer 8

:/ Sorry dude, I don't know...

Answer 9

darn thanks anyway!

Answer 10

It's probably a decimal since when x = -1 it's not on any line...

Answer 11

h(-1) = Is your y coordinate where your x = 0.

Answer 12

I don't think I understand

Answer 13

What iambatman is saying it that we're both morons because we thought that -1 should be the x coordinate, when it was actually y, so therefore the x coordinate would be 0.

Answer 14

it's not -1/2 is it?

Answer 15

I believe not.

Answer 16

what? why are you saying that? \(h(-1)\) is just the value of the function \(h(x)\) at \(x = -1\), and it is approximately -1/2

Answer 17

there won't be any parentheses around the -1 if it is intended to show the inverse function, such as \(h^{-1}(x)\)

Answer 18

Why am I saying what?

Answer 19

Did you look at the attachment?

Answer 20

Sorry, @oroutdoors I was asking why @SharpieStealr and @iambatman were thinking this didn't say exactly what you think it says :-)

Answer 21

No worries! So would -1/2 be right or am I not understanding?

Answer 22

Yeah, @whpalmer4 I've been doing homestudy for hours not to mention I haven't slept in over a day (thanks, insomnia) so my brain and my eyes are kind of not trustworthy at the moment.

Answer 23

Yes, I did look at the attachment.

Yes, -1/2 is the correct answer, in my considered opinion.

Answer 24

Derp, yes it's approximately -1/2.

Answer 25

Awesome it was right! thanks for your help guys!

Answer 26

I just took a quick glance, sorry about that.