Question

Which function matches which line in the graph attached inside?

1) e^x

2) lnx

3) x^2

4) x^1/2

***please explain? :)

Answer 1

graph! :D

Answer 2

I'm not sure what level you are in your math studies, but one thing you could do to start out is plug in a couple of values for x in each of the functions to give yourself a rough idea of what the graphs will look like.

Answer 3

so like choose x=2?

e^2
ln(2)
2^2
2^1/2

? :/

Answer 4

Just graph each one with a calculator, is the easiest way. You can do it w/o one tho

Answer 5

graph where I had subbed all x values with 2?

Answer 6

No, graph the functions.

Answer 7

okay one sec.. lemme try this :)

Answer 8

oh i was wondering, is there an x button on the calc? I use a TI-84 Plus

Answer 9

Yeah, sorry tech difficulties. So, if you have a graphing calc, plugging each into y=x and graphing is the easiest way.

Answer 10

I'm not too familiar with the. 84. I have a 89.

Answer 11

ohh not sure how to do that :(

Answer 12

You don't know how to input an x on your calculator?

Answer 13

i think i do.. but i'm not toooo sure if it's the correct thing...

there's this button that says x,T,ø, n (link in blue)...

is that the right one?

Answer 14

Yep, sounds like it

Answer 15

okay cool, lemme try it :)

Answer 16

i just tried graphing it with e^x

and it doesn't let me :( it says error: window range :/

Answer 17

just tried it on all of them... doesn't let me graph it :/

Answer 18

what should I do to figure out how to identify which is which graph? :/

Answer 19

If the calc doesn't work, you correctly interpreted my statement of plugging in numbers for x.

Answer 20

Evaluating the function will give you the y coordinates.

Answer 21

okay, lemme try that :)

Answer 22

For instance, if x =0, e^0=1. One point on the graph is (0,1).

Answer 23

error: window range

^ fix your viewing window. I'm just surprised you're this clueless with a calc, despite being in a precalc class? :P

Answer 24

how do I fix it? i'm trying but it won't work :/

haha yeah... i always forget the little things on it.. i need to reread the manual :/

Answer 25

set the xmin to -10 and xmax to 10

ymin to -10 and ymax to 10

Answer 26

ohhh okay yay! it works now :)

thank you!!

the xmin was set to like -2.5677388629 something weird like that :P

Answer 27

okay, so e^x is graph A

lnx=D

x^2=B

x^1/2 = C

okay whoah... okay so i'm gonna make sure to always leave it at those numbers!!!

thanks so much!!! :)