Standards: Mathematical Problem Solving and Communication: 2.5.8.A, 2.5.8.B, 2.5.8.C Algebra and Functions 2.8.8.D, 2.8.8.E Objectives:  use rates and.

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Presentation transcript:

Standards: Mathematical Problem Solving and Communication: A, B, C Algebra and Functions D, E Objectives:  use rates and ratios to solve real life problems  use percents to solve and model real life problems Miss Zeuggin September 24 th 2008

Chapter 3 Section 8 Rates/Ratios/Percentages

Introduction s&category_id=316 s&category_id=316

Rates If a and b are two measurable quantities, then the rate of a per b is Example: miles and hours: miles per hour (mph)

Example of Rates You drove 152 miles and it took you 2.5 hours to get there. How many miles per hour where you driving? You spend about $150 dollars a week. About how much per day do you spend?

Using Ratios -comparison of two numbers using division Suppose you got a 37/42 on a test and the teacher told you that the grade going into the grade book was going to be out of 100. How would you solve this? You want to leave a 15% tip on your dinner from TGIFridays that cost you $ How much of a tip do you need to leave?

Percentages 200 people were asked what game system the liked to play the most: What percentage of people like to play Wii? XBOX? PS3? Wii 126 people PS3 22 people XBOX people

Class Work Page 183 #3,7,8,9,11,12,15,16,17

Review for Test JEOPARDY!!!

Homework Page ,9-14,16-20,22,32