Question

Rudy delivers groceries from his uncle’s store to earn extra money. His uncle pays him $25.00 each day he works and an additional $2.50 for each delivery he makes.

Which table shows values for the amount Rudy makes in a day based upon the number of deliveries he makes?

A.
Rudy’s Earnings
Number of deliveries 2 4 7 9
Amount earned $30.00 $32.50 $42.50 $47.50


B.
Rudy’s Earnings
Number of deliveries 2 5 7 10
Amount earned $30.00 $37.50 $45.00 $50.00


C.
Rudy’s Earnings
Number of deliveries 3 5 8 10
Amount earned $32.50 $37.50 $45.00 $50.00

Answer 1

D.
Rudy’s Earnings
Number of deliveries 3 6 8 11
Amount earned $35.00 $42.50 $47.50 $55.00

Answer 2

The equation linking the number of deliveries and pay is:

E = $25.00 + $2.50 * d where d is the number of deliveries and E is the daily earnings.

Test the formula against the chart entries. Note that every two deliveries means $5.00.
That speeds up the mental math a bit.

Answer 3

@Bilaal.K

Attached is an example of what it means to check the data in an answer option to determine if it is correct.

@anx checked option B in the very same problem you posed and was earlier posted by a different Asker. A link to that thread is below in case you want to see it.

http://math.openstudy.com/updates/546ab142e4b0ecc32148b29a