# A bottle of water costs $1.50. Explain how you would make a graph of four ordered pairs to model...

## Question:

A bottle of water costs $1.50. Explain how you would make a graph of four ordered pairs to model the total cost of the water in terms of the number of bottles.

## Cost Function

The total cost of purchased merchandise depends on the price and quantity purchased. The following formula could be used for the total cost:

{eq}TC = (price)\cdot (quantity)= p\cdot q {/eq}. This formula is typically used in finance or economics.

## Answer and Explanation: 1

The table below shows the price, quantity, and the total cost of buying 1,2,3, or 4 bottles.

price | quantity | Total Cost, TC |
---|---|---|

1.50 | 1 | 1.50 |

1.50 | 2 | 3 |

1.50 | 3 | 4.50 |

1.50 | 4 | 6 |

To graph the total cost in terms of the number of bottles, we use the ordered pairs (quantity, total cost): {(1, 1.50), (2, 3). (3, 4.50), (4, 6)}. These pairs are represented by the points A,B,C, and D on the graph.

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Chapter 20 / Lesson 13Learn about the cost function formula. Discover how to find cost function. Explore average cost function and marginal cost function. See examples of finding the cost.