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Chapter 1 Application From Section 1.2 Linear Word Problems Linear Word Problems Three types 1. Tells you how fast something is changing and gives you one data point 2. Gives you two data points and asks for another data point 3. Gives more than two data points and you are to choose two Type 1 A park ranger at Blendon Woods estimated in 2000 there are 6000 deer in the park. She also estimated that the population was increasing by 75 deer each year. Find a linear function that describes the deer population as a function of time since 2000. What will the population be in year 2007? Type 1 Alpine college plans to increase tuition $50 per semester hour each year. In 2001, the tuition was $375 per semester hour. Find a linear function that describes tuition as a function of time since 2001. What will the tuition be in 2007? Type 2 Namid is examining the calling card portion of his phone bill. A 4-minute call at the night rate cost $2.65. A 10minute call at the night rate cost $4.75. Find a linear function that describes cost as a function of time. How much would it cost to talk for half an hour at the night rate? Type 2 The American Automobile Manufacturers Association estimated that 536,000 passenger cars were exported in 1997. In 2001 it was estimated to be 476,000 passenger cars. Find the equation for this linear trend. Analyzing data from the U.S. Energy Department for the period between 1920 and 1960 reveals that coal consumption as a percentage of all energy consumed (wood, coal, petroleum, natural gas, hydro, and nuclear) decreased. In 1920 the index was 72% and by 1960 it had decreased to 22% what was it in 1945, and what would we expect it to be in 1980? Tony Marconi’s company manufactures CD-ROM drives. The company will make $150,000 profit if it manufactures 100,000 drives, and $1,750,000 profit if it manufactures 500,000 drives. The relationship between the number of drives manufactured and the profit is linear. Write an equation that gives the profit P when n drives are manufactured. The surface of Grand Lake is at an elevation of 648 feet. During the current drought, the water level is dropping at a rate of 3 inches per day. If this trend continues, write an equation that gives the elevation in feet of the surface of Grand Lake after x days. HW 1.1-2 Pg 6-8 9, 19, 21, 23, 25, 27, 35 Pg 30-32 85-105 odd Quiz 1.1-1.2 Tomorrow