1. 2.1 Interpreting and Constructing Tables and Graphs. Variables

2. Variables example: 1.Can n be reasonable replaced by a negative value, such as -2? Explain 2.Can n be reasonable replaced by ZERO? Explain 3.What is the possible collections of replacement values for n in this situation?

3. Input and Output 1.What is the blood-alcohol concentration for a 200-pound person who has consumed 4-beers, 9-beers in one hour? 2. What is the blood-alcohol concentration when 8-beers are consumed in one hour? 3. According to the presiding table, as the numbers of beer consumed in one hour increases. What happen to the blood- alcohol concentration?

4. Graphical Representation Ordered Pair also called Coordinates (input, output) (values of horizontal axis, values vertical axis)

6. Write answers in ordered pair 1.From the graph, approximate the blood-alcohol concentration of 200-pound person who consumes two beers in 1 hour. 2.Estimate the number of beers that a 200-pound person must consume in 1 hour to have a blood-alcohol concentration of 0.104. 3.When n = 4 approximate the value of B. 4.When B = 0.155 approximate n.

7. Estimate the Medicare Expenditure in the table Which column represents the input? Which column represents the output ?