At a fall festival, the student council sold 149 drinks and collected $223.50. The total amount collected is proportional to the number of drinks sold. What is the constant of proportionality in terms of dollars per drink ?

Step-by-step explanation:

Find the unit cost:

 $223.50

= $1.50/drink

 149 drinks

Then y = revenue from sales of drinks = ($1.50/drink)(number of drinks).

The constant of proportionality is $1.50/drink.

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