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Mathematics 11 Online
OpenStudy (cookiemonster18):

Graph y=/x/-2

jimthompson5910 (jim_thompson5910):

I assume you mean this right? \[\Large y = |x| - 2\]

OpenStudy (cookiemonster18):

jimthompson5910 (jim_thompson5910):

I would graph it using something like desmos https://www.desmos.com/calculator

jimthompson5910 (jim_thompson5910):

type in `y = abs(x) - 2` the "abs" means "absolute value function"

OpenStudy (cookiemonster18):

so the answer is C???

OpenStudy (cookiemonster18):

thank you @jim_thompson5910

jimthompson5910 (jim_thompson5910):

you're welcome

OpenStudy (cookiemonster18):

can you help with 3 more? @jim_thompson5910

jimthompson5910 (jim_thompson5910):

sure post each as a new question and tag me in it post one at a time

OpenStudy (cookiemonster18):

1.Graph y=-/x-4/

OpenStudy (cookiemonster18):

2.write an equation for the transformation of y=/x/ A.y=/x/+2 B.y=/x/-2 C.y=/x-2/ D.y=/-2x/

jimthompson5910 (jim_thompson5910):

First off, please post ONE at a time.

jimthompson5910 (jim_thompson5910):

I would graph just like in the previous problem. Any ideas what to type into desmos?

OpenStudy (cookiemonster18):

oh sorry thought you meant post all of them 1 by 1, not post 1 answer 1 then post the other. my apology.

jimthompson5910 (jim_thompson5910):

well it makes it easier to post one at a time so we don't get confused on which one we're working on currently

OpenStudy (cookiemonster18):

ok okay and no I have no clue on what to type for the "desmos".

jimthompson5910 (jim_thompson5910):

btw, type | instead of / to mean absolute value so instead of `y=-/x-4/` type this `y = -|x-4|`

jimthompson5910 (jim_thompson5910):

to graph `y = -|x-4|` you would type `y = -abs(x-4)` into desmos

jimthompson5910 (jim_thompson5910):

whatever is in the parenthesis of the "abs" is what goes in the absolute value bars

OpenStudy (cookiemonster18):

umm...I cant find any place that would graph that so ima guess that it's B

jimthompson5910 (jim_thompson5910):

desmos doesn't work?

jimthompson5910 (jim_thompson5910):

https://www.desmos.com/calculator

OpenStudy (cookiemonster18):

D :/ ?

jimthompson5910 (jim_thompson5910):

can you show me a screenshot of what graph you get when you type into desmos

OpenStudy (cookiemonster18):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

why are you that zoomed out? you should zoom in until you can see the vertex a bit better

OpenStudy (cookiemonster18):

sorry meant to send this one

jimthompson5910 (jim_thompson5910):

ok much better

OpenStudy (cookiemonster18):

so the answer this one is D?

OpenStudy (cookiemonster18):

so now we're one #2 @jim_thompson5910

jimthompson5910 (jim_thompson5910):

ok post that one

OpenStudy (cookiemonster18):

2.write an equation for the transformation of y=/x/ A.y=/x/+2 B.y=/x/-2 C.y=/x-2/ D.y=/-2x/ @jim_thompson5910

jimthompson5910 (jim_thompson5910):

I'm lost. Was there a graph given here? or no?

OpenStudy (cookiemonster18):

no

jimthompson5910 (jim_thompson5910):

do they give instructions like "shift up 2 units" or something?

OpenStudy (cookiemonster18):

it just want us to write an equation for the transformation of y=/x/

jimthompson5910 (jim_thompson5910):

can you post a screenshot of the full problem?

OpenStudy (cookiemonster18):

sure @jim_thompson5910

jimthompson5910 (jim_thompson5910):

ok thanks

jimthompson5910 (jim_thompson5910):

you just tack on a `-2` to shift all of the original parent function 2 units down

OpenStudy (cookiemonster18):

so the answer is B @jim_thompson5910 ??? I don't quit understand what you mean

jimthompson5910 (jim_thompson5910):

yes `y = |x| - 2`

OpenStudy (cookiemonster18):

now we can work on #3 and we'll be done :)) thank you @jim_thompson5910 for helping me this far

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