Answer
Let x be the number of drinks and y be the cost. Since each drink is the same price, you must multiply \$2.50 by the number of drinks to find the cost. Assume that x is the number of drinks and y is the cost.
$2.50x=y$
Work Step by Step
$\underline {\#drinks}\ \ \ \ \ \ \underline{cost}$
$1\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \$2.50$
$2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \$5.00$
$3\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \$7.50$
