Every hour driving uses 3 gallons of gas. use a table to find how man you gallons of gas would be used if driving for 15 hours

After fifteen hours of driving, you would have used 45 gallons of gas. 

Hour-3 gallons
2 hour-6 gallons
5 hour- 15 gallons 
15 hour- 45 gallons
For every hour he uses 3 gallons
3 times 15 equals 45 gallons

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