We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
128
2
avatar

1

2.

3.

 Dec 7, 2018
 #1
avatar+101796 
+1

We can do this with a "formula"

 

New point =  [ old point - center of dilation ] (scale factor) + center of dilation

 

First one

 

New point =  [ ( 2,4) - (0,0)] (1/2) + (0,0) =   [ 2,4](1/2) + (0,0) = (1,2)

New point  = [ ( -2, 8) - (0,0) ] (1/2) +  (0,0) = [ -2,8](1/2) + (0,0) = (-1, 4)

New point = [ (-4, 2) - (0,0)](1/2) + (0,0) = [-4,2](1/2) + (0,0) = (-2, 1)

 

Here's the graph:

 

 

 

cool cool cool

 Dec 7, 2018
 #2
avatar+101796 
+1

Here's the second one

 

New point =

[ (1, 4) - (-3, 1) ] (2) + (-3, 1) = [ 4, 3 ](2) + (-3,1) = [ 8, 6] + (-3, 1) = ( 5, 7)

 

New point =

[ (2, 2) - (-3,1)](2) + (-3, 1) = [ 5,  1](2) + (-3, 1)  = [ 10,2] + (-3, 1) = (7, 3)

 

New point

[ (-3, 3) - (-3, 1)](2) + (-3,1) = [ 0, 2] (2) + (-3,1) = [ 0, 4] + (-3, 1) = (-3, 5)

 

Here's the image

 

 

See if you can do the last one....

 

 

cool cool cool

 Dec 7, 2018

11 Online Users

avatar