Question

This table shows the different rates to ship books through the mail. Are the rates proportional? Explain.

Pounds: Cost:
4. $3.55
6. $4.33
8. $5.11

Answer 1

Yes

Explanation:

They have a similar difference of .78

Answer 2

Yes

Explanation:

difference between all of them is 0.78

it goes up 0.39 everytime it goes up 1.

The rates are proportional

4.33-3.55

0.78

5.11-4.33

0.78

0.78/2

0.39