Show:
Scale Factor
New image
Proportional or not?
Random
100
Preimage: (2, 2) Image: (5, 5)
What is 2.5?
100
Preimage: (7, 2) Scale factor: 10
What is (70, 20)
100
Preimage: (7, 8) Image: (56, 63)
No
100

If your scale factor is greater than 1, what happens to your image?

It gets bigger.

200
Preimage: (7, 8) Image: (56, 64)
What is 8?
200
Preimage: (3, 8) Scale factor: 5
What is (15, 40)
200
Preimage: (1, 10) Image: (10, 1)
no
200

If your scale factor is less than 1, what happens to your image?

It gets smaller.

300
Preimage: (6, 3) Image: (2, 1)
What is 1/2?
300
Preimage: (27, 37) Scale factor: 2
What is (54, 74)
300
Preimage: (42, 49) Image: (6, 7)
Yes
300

What does the scale factor indicate?

How much to dilate your image.

400
Preimage: (46, 37) Image: (23, 18.5)
What is 1/2?
400
Preimage: (28, 83) Scale factor: 5
What is (140, 415)
400
Preimage: (48, 336) Image: (1, 7)
yes
400

If you have a point that is (3,9) with a scale factor of 1/3, what are the new coordinates?

(1,3)

500
Preimage: (53.7, 35.8) Image: (161.1, 107.4)
What is 3?
500
Preimage: (222, 17) Scale factor: 34
What is (7548, 578)
500
Preimage: (247, 583) Image: (1799, 4081)
Yes
500

If you have an pre- image with the coordinates of (10, -25), what are the coordinates after a dilation of 1/5?

(2, -5)