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Solve.

DRINKS It costs $3 per bottle of orange drink. Graph an equation to represent the cost of purchasing x bottles of orange drink.

Understand Read the question. Write what you know.

Orange drink costs $3 per bottle.

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Plan Pick a strategy. One strategy is to write an equation.

Let x represent the number of bottles and y represent the cost.

y = 3x

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Solve Use the equation to make a function table.

Graph the ordered pairs in the table on the graph.

To find the slope, move up 3 unit(s) and to the right 1 unit(s).

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Solve Use the equation to make a function table.

The change in x-values and the change in y-values are constant from one point to another.

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Check Use the formula for slope to check your answer.