How can I make a table that can be a function with a good real-life scenario like the example attached?

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter8: Introduction To Functions
Section8.8: Linear And Quadratic Functions
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Please help! How can I make a table that can be a function with a good real-life scenario like the example attached?  

EXAMPLE of a relation that IS a function (you cannot use this one):
First quantity: miles that were driven in a week to go from home to work and back again
Second quantity: gallons of gas used per week
1.
Соmmuting
miles driven
240
320
240
400
240
320
240
240
week
per
Gallons of
used
per
8.
10.7
8
13.3
8
10.7
8.
8.
gas
week
2.
Yes, this is a function because once I know how many miles I drove in a week, I get the same number for gallons of
gas used (240 miles always goes with 8 gallons).
Transcribed Image Text:EXAMPLE of a relation that IS a function (you cannot use this one): First quantity: miles that were driven in a week to go from home to work and back again Second quantity: gallons of gas used per week 1. Соmmuting miles driven 240 320 240 400 240 320 240 240 week per Gallons of used per 8. 10.7 8 13.3 8 10.7 8. 8. gas week 2. Yes, this is a function because once I know how many miles I drove in a week, I get the same number for gallons of gas used (240 miles always goes with 8 gallons).
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