1. Ratios and Proportions March 8 & 9 College Readiness Standards: Solve routine two-step or three-step arithmetic problems involving concepts such as rate and proportion, tax added, percentage off, and computing with a given average Calculate the missing data value, given the average and all data values but one

2. Objectives Some students will be able to apply concept of ratio and proportion to word problems Most students will be able to understand the concept to solve ratio and proportions problems All students will be able to write a ratio and understand the meaning of the ratio

3. Binder Policy We are going to continue to be accountable for our actions. If you are not in your seat with your binder in 3 minutes, you will serve teacher time until 3. READY IN 3 or STAY ‘TIL 3 NO EXCUSES…NO I HAVE TO GO TO LOCKER…BE PREPARED!!!!

4. Agenda Bell ringer 10 min (6AB 5min) Attendance and Discipline Program Notes on Ratio and Proportions w/ Guided Practice 15min (6AB 10min) Independent Practice 30min (20min) Paper Distribution/ Announcements 5min (5min) Clean Up 5min

5. Bell Ringer 10min (6AB 5min) The mean of the data set is 37. The numbers of the set is {30, 35, 38, 33, x}. What is x? Find the missing number. If the Marshall boys basketball team averaged 48.6 pts/game in 20 games. In their 21 st game, their average rose t0 50.00 pts/game. How many points did they score in game21?

6. Bell Ringer (6AB 5min) Marshall BoysGirls 9 th8263 10 th10187 11 th8462 12 th 10294 What is the ratio of boys to girls? What is the ratio of 9 th graders to 10 th graders? What is the ratio of 11 th and 12 th graders to all students?

7. Attendance & Discipline Star Program

8. Recap of Mean, Median, Mode

9. Vocabulary Data Set – the group of numbers/ or the information Mean – the average of a data set Median – the number that falls in the middle when the data is arranged order from least to greatest Mode – the number that occurs most often What is the purpose of using these measures? The purpose is to compare different data sets.

10. Recap Data Set {22, 14, 18, x-5} If the mean of this data set is 16. What is x?

11. Median Data Set { 14, 3, 19, 8, x, 5} The median of this data set is 9.5, where x is the 4 th term. What is x?

12. Mode Data Set {1, 2, 3} What is the mode of the data set?

13. Ratio & Proportions Vocabulary Ratio: a relationship between two numbers of the same kind (i.e. objects, persons, students, units of whatever identical dimension Proportion: a name given to a statement that two ratios are equal.

14. Ratio & Proportions What are three ways to represent a ratio of 3 blue marbles to 5 red marbles? 1.3 to 5 2. 3/5 3. 3:5

15. Understanding ratios from data Using Ratios and Proportions packet #5-6 What are the total number of students at Tyler Junior High School (TJHS)? What are the total number of boys at TJHS? What are the total number of girls? What is the ratio of boys to total students? What is the ratio of total students to girls? What is the ratio of 7 th graders to 8 th graders?

16. Application of ratios 6AB Measurement of similar figures Drawing on whiteboard Triangle ABC is similar to Triangle XYZ Segment AB = 6, Segment XY = 2 What is the measure of BC? If the measure of Segment YZ = 3?

17. Independent Practice Ratio and Proportions 1 – 20 Finish Mean, Median, Mode DON’T FORGET MORTGAGE PROJECT MAKEUP TODAY 2:45 – 3:30 Turn in Homework

18. Chicago Bulls Roster 3 Omer Asik 7-0Omer Asik 6 Keith Bogans 6-5Keith Bogans 5 Carlos Boozer 6-9Carlos Boozer 11 Ronnie Brewer 6-7Ronnie Brewer 45 Rasual Butler 6-7Rasual Butler 9 Luol Deng 6-9Luol Deng 22 Taj Gibson 6-9Taj Gibson 26 Kyle Korver 6-7Kyle Korver 13 Joakim Noah 6-11Joakim Noah 1 Derrick Rose 6-3Derrick Rose 24 Brian Scalabrine 6-9Brian Scalabrine 40 Kurt Thomas 6-9Kurt Thomas 32 C.J. Watson 6-2C.J. Watson