The set of ordered pairs represents a function. Write a rule that represents the function.
1 answer:
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Call the price of a book 'b'. We know that lunch cost $3.25 so let's say 
we also know the total is $40. So we can write:
or
and then solve for 'b':
A book cost $5.95
or
and then solve for 'b':
A book cost $5.95