Is It a Function? Cheap Gas on Route 66 in Illinois

The following picture was taken at a 1932 Standard Oil gas station located along Route 66 in Odell, Illinois.

[cheap gas picture]

The gas price was $0.277 per gallon. The following table was provided to help customers calculate their gas bill.

    2  3   4   5   6   7   8   9   10      <-- # gallons
   ====================================
   .55    1.11    1.66    2.22     2.77
   ------------------------------------    <-- total cost
      .83     1.39    1.94     2.49
Exercises
  1. A purchase of 5 gallons cost $_________.

  2. A purchase of _______ gallons cost $2.22.

  3. No or Yes: Given the price of gas is $0.277, the total cost for gas is a function of the number of gallons pumped.

  4. No or Yes: Given the price of gas is $0.277, the number of gallons pumped is a function of the total cost.


Creator: Gerald D. Thurman [gthurman@gmail.com]
Created: 20 January 2007

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This work is licensed under a Creative Commons License.