Question

The image of (3,-6) after a dilation with respect to the orgin is (18,-36). What is the scale factor of this dilation

Answer 1

6

Answer 2

thank you

Answer 3

Do you know why?

Answer 4

no can you kinda explain it to meh

Answer 5

Ok

Answer 6

A dilation "standard form is (x*k, y *k)

Answer 7

okay

Answer 8

So basically, 3k=18 and -6k=-36. Solve for k and you get 6.

Answer 9

Did you understand it?

Answer 10

yeah now I do

Answer 11

ok

Answer 12

thank you

Answer 13

Any other questions?

Answer 14

The vertices of a triangle are A(-2,1), B (-2,-2), And C(2,4). And It Say Name The vertices of the image reflected over the x-axis?.....like I don't get this one at all

Answer 15

Ok
Formula for reflecting of x-axis: (x.y*-1)

Answer 16

So Vertex A' would be (2,-1)

Answer 17

Oh Sorry

Answer 18

(-2,-1)

Answer 19

........you kinda lost me

Answer 20

http://www.regentsprep.org/Regents/math/geometry/GT1/reflect.htm

Answer 21

okay so the vertex A
will be (2,-1)

Answer 22

Wait Vertex A was (-2,1) so y = 1
so -1*1=-1
so (-2,-1

Answer 23

okay, its one more I don't understand.. and I promise this is the last one

Answer 24

Its ok, go

Answer 25

oh nevermind I have to draw it.. but thanks for your help

Answer 26

wait I think you can kinda help hold on

Answer 27

ok

Answer 28

it says find the image of A(-1,2) after two reflections, first over the line y=1, then over the line x=-1.....

Answer 29

Thats weird. I got (-1,2). Let me check over again.

Answer 30

ok I got (2,-1)

Answer 31

sorry meant to say (-1,0) thats why I said thats weird

Answer 32

I think i'm right though

Answer 33

I can't really show you it on here that well so let me send you a site.

http://www.wolframalpha.com/input/?i=reflect+%28-1%2C2%29+over+y%3D1

http://www.wolframalpha.com/input/?i=reflect+%28-1%2C0%29+over+x%3D-1

Answer 34

The distance from the original point to the line of reflection has to be equal to the distance from the line of reflection to the result (point after reflection).

Answer 35

I'm going to have to go soon. Do you understand what I said or is it still confusing?

Answer 36

i understand thanks for helping

Answer 37

your welcome.

Answer 38

wait i can stay if u need me to

Answer 39

Are you sure?

Answer 40

yea, im sure and plus i promised that will be the last one ....thank you