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Chapter 5: Automobile Ownership

Chapter 5: Automobile Ownership. 5.1 Classified Ads. How many have their own car??. Did your parents buy it? Did you go through the process with them? What did you have to do? Did you buy your own car? How did you find it? What was the process you went through to buy the car?.

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Chapter 5: Automobile Ownership

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  1. Chapter 5: Automobile Ownership 5.1 Classified Ads

  2. How many have their own car?? • Did your parents buy it? • Did you go through the process with them? • What did you have to do? • Did you buy your own car? • How did you find it? • What was the process you went through to buy the car?

  3. Car “lingo” • Look at the classified ads in front of you • How many abbreviations do you understand? • Write down the different abbreviations you see and what you think that mean.

  4. Car “lingo” Here are some of the words you may have seen • Mint or immaculate describe a car in excellent condition • A car with many options is said to be loaded In terms of the price of the car • Negotiable meaning the seller is willing to bargain with you • Firmmeans that they are unwilling to change the price • Sacrifice means that the seller has to sell the car quickly and the price is lower than its worth

  5. Car Abbreviations

  6. Sales Tax • In some states, when buying a used car you must pay a sales tax on the purchase amount! • California has a 6.25% sales tax

  7. Example 1 • Kerry purchased a used car for $7,400 and had to pay 8½% sales tax. How much tax did she pay?

  8. Check your understanding • The sales tax rate in Mary Ann’s state is 4%. If she purchases a car for x dollars, express the total cost of the car with sales tax algebraically.

  9. Example 2 • The cost of a classified ad is determined by its length. John plans to sell his car and places a 5-line ad. The newspaper charges $31 for the first two lines and $6 per extra line to run the ad for one week. What will John’s ad cost to run for two weeks?

  10. Check your understanding • Ramon plans to sell his car and places an ad with x lines. The newspaper charges y dollars for the first g lines and p dollars per extra line to run the ad for a week. If x > g, express the cost of running the ad for a week.

  11. Math terms • Remember that the domain is the set of values you can input into a function • We will be looking at piecewise functions or splitfunctions • Functions that gives a set of rules for each domain of the function

  12. Example 3 • Jason works for the Glen Oaks News and is writing a program to compute ad costs. He needs to enter an algebraic representation of the costs of an ad. His company charges $42.50 for up to five lines for a classified ad. Each additional line costs $7. Express the cost of an ad with x lines as a function of x algebraically.

  13. Check your understanding • The Smithtown News charges $38 for a classified ad that is 4 or fewer lines long. Each line above four lines costs an additional $6.25. Express the cost of an ad as a piecewise function.

  14. Example 4 • Roxanne set up the following piecewise function which represents the cost of an auto classified from her hometown newspaper. • If x is the number of lines in the ad, use words to express the price c(x) of a classified ad from this paper.

  15. Example 5 • Graph the piecewise function Roxanne created in Example 4. • A cusp is where the two lines meet

  16. Ch 5 Asnmt 1 • Pg. 222 #3, 4, 6, 7, 9, 12, 14

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