+0  
 
+1
37
6
avatar

https://vle.mathswatch.co.uk/images/questions/question1062.png

https://vle.mathswatch.co.uk/images/questions/question16320.png

 

question c for both pl,z

 May 3, 2020
 #1
avatar+300 
+1

For the first one:

 

So it looks like as the age of a car goes up, its price and value come down. Logical, right? :D

 

a) We know that each point represents a car. Its x-value (i.e. how far away to the left or right it is from 0) is its age, and its y-value (i.e. how far away to the north or south it is from 0) is its cost. 

 

If a car is 4 years old (it has an x-value of 4) and its price is 2,600 pounds (it has a y-value of 2600), where will the point representing the car go? Put the point there :D

 

b) When looking at a relation between the x and y values (in this case, the age and price of the car) in a scatter plot, we don't need to find some equation. We are looking for a correlation.

There are 3 situations: 

  1. There is a positive correlation (every time x increases, y increases too). 
  2. There is a negative correlation (every time x increases, y decreases)
  3. There is no correlation (RANDOM!!!)

In this problem, it looks like the price of a car comes down when its age increases (as we wrote in the first sentence xD). 

Basically, every time x (the age) increases, y (the price) decreases. Now, what correlation does this remind you of? :D 

 

c) I trust you can do this on your own, now that you know about correlations! Here, your answer doesn't need you to be specific: You can make up a value! Just make sure it doesn't too strongly resist the correlation you set in part (b) :D

 

Edit: oops, didn't know it was only question (c). Oh well, the more you know! xD

 May 3, 2020
edited by CentsLord  May 3, 2020
 #2
avatar
+1

quetion c has to be accurate

Guest May 3, 2020
 #3
avatar+300 
+1

Are you sure? Hmm. With scatter plots, you can never really be accurate.

CentsLord  May 3, 2020
 #4
avatar
+1

i tried plz show your estimate

Guest May 3, 2020
 #5
avatar
0

plz show your estimate

Guest May 3, 2020
 #6
avatar+300 
+1

I can't show an estimate (I didn't even make one)! It is up to you. You make the estimate, does some external source command you to be exact? :D

CentsLord  May 3, 2020

11 Online Users

avatar