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Mathematics 8 Online
OpenStudy (anonymous):

I have the picture but I don't know how to unload it . math problem

OpenStudy (amistre64):

use the attach file button ...

OpenStudy (anonymous):

OpenStudy (anonymous):

ahh thanks can u see it ?

OpenStudy (amistre64):

i can see it now, what would you say needs to be done?

OpenStudy (anonymous):

im not sure I was confused

OpenStudy (amistre64):

would you agree that we need to flip it from side to side somehow?

OpenStudy (anonymous):

yes

OpenStudy (amistre64):

what process do you know will let us do that?

OpenStudy (amistre64):

if we want y to stay the same (for the moment), but flip all the x parts to the other side ....

OpenStudy (anonymous):

I think transformation ?

OpenStudy (amistre64):

i got no idea what to name it .... that should be contained in your material. would you agree that for all points (x,y), that we can flip about the y axis by making them all (-x,y)? \[f:(x,y)\to(-x,y)\]

OpenStudy (anonymous):

yes I agree

OpenStudy (amistre64):

lets work with just one point, say A, if we move A the rest move along with it: A: (-1,3) flip A to get (1,3) now we can move it by addition such that it matches A'

OpenStudy (amistre64):

A' is (1,1) what do we need to add to the parts of A to get from (1,3) to (1,1)?

OpenStudy (anonymous):

slide?

OpenStudy (amistre64):

i think the term is glide :) but yeah, now that we have this thing flipped over; we need to 'slide' it into position by adding what is needed to actaully move it

OpenStudy (amistre64):

do you agree that (1,3-2) = (1,1)

OpenStudy (anonymous):

Yes I agree

OpenStudy (amistre64):

as a strategy for this problem we took a point: (x,y) we flipped it over the y axis by negating x: (x,y) -> (-x,y) we then add -2 to the y part to move it in place: (-x,y) -> (-x,y-2)

OpenStudy (amistre64):

youll have to reference your material to determine what those are actually called tho

OpenStudy (anonymous):

Alright, thanks @amistre64

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