Question

Pentagon ABCDE and pentagon A’B’C’D’E’ are shown on the coordinate plane below.



Which two transformations are applied to pentagon ABCDE to create A’B’C’D’E’?
Answer
translated according to the rule (x, y) → (x + 2, y + 8) and reflected across the x-axis
translated according to the rule (x, y) → (x + 8, y + 2) and reflected across the x-axis
translated according to the rule (x, y) → (x + 2, y + 8) and reflected across the y-axis
translated according to the rule (x, y) → (x + 8, y + 2) and reflected across the y-axis

Answer 1

@apoorvk can you help me please D:

Answer 2

Well well.

Do you realise that this 'other' Pentagon is kinda flipped about the y-axis?

Answer 3

Yea

Answer 4

very good. you know what that implies? :P

Answer 5

It means that it's 'reflected' across the y-axis. getting the feel?

Answer 6

so it is either C or D?

Answer 7

Please, answer quickly, I have to go soon :/

Answer 8

Me no answer. You gonna find it. Soon too.

Just imagine this. the pentagon being reflected across the y-axis and then being moved a certain distance to the left, and then to the bottom.

How many units to the left and then how many to the bottom? Pick any reference point (for eg. E', and then see where it would have been after reflection, and where it lies now after the translation).

Answer 9

I am gonna go with C, should I?

Answer 10

I dunno. I don't 'go' with things. I find 'em out. Barely takes a minute usually.

The 'only' reflected pentagon, would have it's E' at (-1,5). Now how many units has E' been shifted? along x-axis and along y-axis? :P

Answer 11

The other E is at 1,5

Answer 12

Idk, how can you tell how much it has been shifted?

Answer 13

Not the other E. I want the E' --> "E-prime". It's position in the graph.

You know how much it has shifted by counting the no. of boxes it has moved.

Answer 14

it has moved 2,2

Answer 15

2 to the left yes, but looks more like '8' to the bottom. check it out.

Answer 16

now what do you think? 2 to the left, and 8 to the bottom.

Answer 17

So it would be C. Because 2 left or right means x axis and bottom and top is Y.

Answer 18

c'mon you're a moment away from glory!! :P

@DimDanny

Answer 19

So it is incorrect?!?

Answer 20

So I would have to say D

Answer 21

sorry not D, A

Answer 22

cmon man I have to go to a graduation lol. I'm pretty sure it is A.

Answer 23

lol -.-

Answer 24

Not D.

which option says reflection about y-axis, and a translation of 2 along negative 'x' and 8 towards negative 'y'?

Oh sorry, forgot to provise this bit--> for a translation of 'a' units along the x-axis and 'b' units along the y-axis, the rule if (x-a, y-b).

here a=-2, and b=-8.

Answer 25

am sorry, took some time to reply.

Answer 26

@DimDanny

Answer 27

I changed my answer to B

Answer 28

I mean A, lol

Answer 29

@apoorvk

Answer 30

nope. read what i just said.

Answer 31

that is not one of the answers lol..

Answer 32

If it is not A then it must be C!

Answer 33

ja. but sad that you had to guess inspite of the explanations.

Answer 34

I didn't guess, C was on if my first answers. Then you said NO! Just be more straight forward man... You had me going in circles.

Answer 35

But thanks for the help.

Answer 36

lol, how did i miss that reply?? my bad sorry..

Answer 37

NP :P