Question

The figures shown are similar.

What is the scale factor?

Answer 1

4/7
1/9
6/7
3/7

Answer 2

im doing somethin like tis rn

Answer 3

What do you think? We might need the figure.

Answer 4

hold on lemme get the figures

Answer 5

https://static.k12.com/calms_media/media/1299500_1300000/1299527/1/781b1062d78a1bb9c835059b58624d124776c27c/141093.jpg

Answer 6

Okay, now give the answer your best shot. It started where and ended where? Did it grow or shrink?

Answer 7

Ok it started high but ended low

Answer 8

so i find which is similar to 21:12

Answer 9

Okay, this means something for the scale factor. Should it be Greater than 1 or less than 1. If nothing happens, the scale factor is 1.

Answer 10

It should be greater than 1 I think?

Answer 11

The world should make sense. Shrinking is less than 1.

4/7 < 1
1/9 < 1
6/7 < 1
3/7 < 1

Okay, that didn't narrow down anything. Had we found 9/5, or anything else greater than 1, we could just throw it out.

Okay, we have a 21 and a 12. Which fraction or ratio is correct?

21/12 or 12/21

Answer 12

21/12

Answer 13

You fell into the trap. 21/12 > 1.

We need the ratio that is less than 1. 12/21

Now, reduce to lowest terms. Find common factors and discard them.

Answer 14

ohhh ok so the answer is 4/7

Answer 15

12/21 = (3*4)/(3*7) = 4/7

I think you have it. Good work. Move on to the next one.