I really don't understand this video....HELP!

First you need to find out the translation. Then apply it to the point. If you think about it it's just an extended version of the previous problems.

I can not understand it: why 31-34,-529-502? This is my thinking:31-(-34)=31+34=65 -529-(-502)=-529+502=-27 The number 34 and 502 are negitive,right?

The -34 and -502 are the rules for the translation. Whatever pint you're translating, you add -34 to the x-coordinate and -502 to the y-coordinate. Subtracting instead of adding would give you the opposite effect, and translate the point up and to the right instead of down and to the left.

Main content

High school geometry

Course: High school geometry > Unit 1

Lesson 3: Translations

Translation challenge problem

Name: Translation challenge problem
Uploaded: 2013-12-25T20:07:24Z
Description: A translation acting on the coordinate plane takes the point (-169,434) to point (-203, -68). What are the coordinates of the image of point (31, -529) under this translation?

CCSS.Math:

HSG.CO.A.5

Google Classroom

A translation acting on the coordinate plane takes the point (-169,434) to point (-203, -68). What are the coordinates of the image of point (31, -529) under this translation?

. Created by Sal Khan.

Want to join the conversation?

Sort by:

ZardinTheTreeAtlas
Posted 7 years ago. Direct link to ZardinTheTreeAtlas's post “I really don't understand...”
I really don't understand this video....HELP!
Button navigates to signup pageComment on ZardinTheTreeAtlas's post “I really don't understand...”
(9 votes)
Answer
- mayg1
  Posted 6 years ago. Direct link to mayg1's post “First you need to find ou...”
  First you need to find out the translation. Then apply it to the point. If you think about it it's just an extended version of the previous problems.
  Comment on mayg1's post “First you need to find ou...”
  (3 votes)
Mozes
Posted 2 months ago. Direct link to Mozes's post “Hamburg”
Hamburg
Button navigates to signup pageComment on Mozes's post “Hamburg”
(6 votes)
Answer
- Mikeal
  Posted a month ago. Direct link to Mikeal's post “heisenburger”
  heisenburger
  Button navigates to signup page
  (1 vote)
jzemla28
Posted a month ago. Direct link to jzemla28's post “how do you get freainds?”
how do you get freainds?
Button navigates to signup pageButton navigates to signup page
(4 votes)
Answer
- glungus
  Posted 5 days ago. Direct link to glungus's post “you dont”
  you dont
  Button navigates to signup page
  (1 vote)
edwardd
Posted 9 months ago. Direct link to edwardd's post “6 years is crazy”
6 years is crazy
Button navigates to signup pageComment on edwardd's post “6 years is crazy”
(4 votes)
Answer
rurb0583
Posted a month ago. Direct link to rurb0583's post “hey bbg”
hey bbg
Button navigates to signup pageComment on rurb0583's post “hey bbg”
(2 votes)
Answer
Shreyas Potnuru
Posted 6 years ago. Direct link to Shreyas Potnuru's post “do you just subtract ever...”
do you just subtract everything or are you supposed to add and then subtract
Button navigates to signup pageButton navigates to signup page
(1 vote)
Answer
- cselliott
  Posted 2 years ago. Direct link to cselliott's post “You could add negatives o...”
  You could add negatives or subtract positives. For example, -3+2 is equal to 2-3.
  Button navigates to signup page
  (1 vote)
黎欣欣
Posted 3 years ago. Direct link to 黎欣欣's post “I can not understand it: ...”
I can not understand it:
why 31-34,-529-502?
This is my thinking:31-(-34)=31+34=65
-529-(-502)=-529+502=-27
The number 34 and 502 are negitive,right?
Button navigates to signup pageComment on 黎欣欣's post “I can not understand it: ...”
(1 vote)
Answer
- Hecretary Bird
  Posted 3 years ago. Direct link to Hecretary Bird's post “The -34 and -502 are the ...”
  The -34 and -502 are the rules for the translation. Whatever pint you're translating, you add -34 to the x-coordinate and -502 to the y-coordinate. Subtracting instead of adding would give you the opposite effect, and translate the point up and to the right instead of down and to the left.
  Button navigates to signup page
  (3 votes)
eb3587
Posted 5 months ago. Direct link to eb3587's post “at 0:01, why does he not ...”
at
0:01
, why does he not talk?
Button navigates to signup pageComment on eb3587's post “at 0:01, why does he not ...”
(2 votes)
Answer
Joy141
Posted 5 years ago. Direct link to Joy141's post “So all you have to do is ...”
So all you have to do is subtract? Can you PLEASE tell my if I am wrong or right. THANKS!
Button navigates to signup pageComment on Joy141's post “So all you have to do is ...”
(1 vote)
Answer
28isaaca102
Posted 23 days ago. Direct link to 28isaaca102's post “why this guy”
why this guy
Button navigates to signup pageButton navigates to signup page
(1 vote)
Answer

Video transcript

Voiceover:A translation acting on the coordinate plane takes a point negative 169 comma 434 to point negative 203 comma negative 68. What are the coordinates of the image of point 31 comma negative 529 under this translation? I encourage you to pause this video and try to think about it on your own. Let's think about what the change in x that this translation does and the change in y that this translation does. Our change in x is going to be our ending point, so negative 203 minus our starting point. Minus negative 169. This is the same thing as, I'll just write it in yellow, negative 203 plus 169 which is the same thing as 169 minus 203 I'm just writing it this way for put my brain to process it, which is the same thing as the negative of 203 minus 169. Let's see this one is the easiest for my brain to process this is going to be 34. This is going to be negative 34 that's our change in x. I was thinking about our change in y. Our change in y is our ending point is negative 68, and our starting point is 434. Our ending point minus our starting point, minus 434 is going to be equal to, so this is just going to be the same thing as the negative of 68 plus 434 and let's see 430 plus 60 is 490, plus another eight plus four, plus another 12 so that's going to get us to 502. This is going to be negative 502. This translation, what it does is it shifts us in the x direction by negative 34 and it shifts us in the y direction by negative 502. If we're starting at 31 comma negative 529, we're going to end up at, let me write it this way, if we're starting at this point, we're starting at 31 comma negative 529 we're going to end up at 31 minus 34 that's how much we're going to shift it and negative 529, so negative 529 minus 502. What's this going to be? 31 minus 34 is negative 3 and then if we have negative 529 minus 502 that's going to be negative 1031. That is where we end up, we end up at the point negative 3 comma negative 1031, under this point gets mapped to this point under this translation.