Question

Rachel bought 12 rolls of packing tape and paid a total of $33.60.

Kevin also bought rolls of packing tape. The table shows the total amount he is paid for different numbers of packing tape.How do the unit rates compare?Rachel's unit rate is_____ than Kevin's because______ is greater than_____ .
Numbers of rolls:
2,
5,
8
Amount paid:
$6.40
$16.00,
$25.60

Answer 1

Rachel's unit rate is : 2.80

Kevin's is: 3.20

( you simply divide the dollar amount by the rolls of tape-- 33.60÷ 12)
Therefore, Kevin's is greater than Rachel's.

Answer 2

Rachel paid $33.60 for 12 rolls.

Unit rate paid by Rachel =
`(33.60)/(12)`

= 2.8

From table,

Kevin paid $6.40 for 2 rolls.

Unit rate paid by Kevin =
`(6.40)/(2)`

= 3.20.

Check:

Kevin bought 5 rolls for $16

5 × 3.2 = 16

He also bought 8 rolls for $25.6.

8 × 3.2 = 25.6.

If we compare the unit rates paid by Rachel and Kevin,

Rachel's unit rate is less than Kevin's because 3.2 is greater than 2.8.