6 The bottled water industry is currently worth over $200 billion annually. The average
cost of a bottle of water in the United States is 50 cents.
a Determine the equation that represents the cost (v) of buying x bottles of water.
What does the gradient represent in this equation?
b What is the total cost of buying one bottle of water a day for a year (not a leap year)?
c A high-quality, refillable water bottle costs approximately $40. How many bottles of
water would you have to drink in order for this option to be more cost effective?
Id What other factors, apart from cost, might inflence someone's decision whether to
carry their own water bottle or to buy bottles of water?