Question 658406
Nancy received a piggy bank containing $10.00 and adds an additional $1.00 per week. How much money is in her piggy bank after x weeks?
Value in x weeks = 10 + x
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V(x) = 10 + x
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problem 2 
if you use 300 gallons of gas in 4.8 hours, then find the rate of change ($gallons/hour)
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rate = (# of gallons)/(# of hours) = 300/4.8 = 62.5 gal/hr
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Cheers,
Stan H.
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