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Imagine you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons....

1. Imagine you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equationa. What does the number 3.12 represent?b. Find C(2).c. Find C(9).d. For the average motorist, name one value for g that would be inappropriate for this function’s purpose. Explain why you chose that number.e. If you were to graph C(g), what would be an appropriate domain and range? Explain your reasoning.2. Examine the rise in gasoline prices from 1997 to 2008. The price of regular unleaded gasoline in January 1997 was $1.26, and in January 2008, the price of regular unleaded gasoline was $2.31 (“Consumer price index,” 2008). Use the coordinates (1997, 1.26) and (2008, 2.31) to find the slope, or rate of change, between the two points. Describe how you arrived at your answer.3. The linear equationrepresents an estimate of the average cost of gas for year x starting in 1997 (“Consumer price index,” 2006). The year 1997 would be represented by x = 1, for example, because it is the first year in the study. Similarly, 2005 would be year 9, or x = 9.a. What year would be represented by x = 5?b. What x-value represents the year 2016?c. What is the slope, or rate of change, of this equation?d. What is the y-intercept?e. What does the y-intercept represent?f. Assuming this growth trend continues, what will the price of gasoline be in the year 2018? How did you arrive at your answer?4. The linerepresents an estimate of the average cost of gasoline each year. The lineestimates the price of gasoline in January of each year (“Consumer price index,” 2006).a. Do you expect the lines to be intersecting, parallel, or perpendicular? Explain your reasoning.b. Use the equations of the lines to determine if they are parallel. What did you find?c. Did your answer to Part b. confirm your expectation in Part a?

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