Data Analysis s-ID.1, S-ID.5 12/11/15 Ms. Stack

12-11 Do Now ONE more week! We can do this  Two times Antonio’s age plus three times Sarah’s age equals 56. Sarah’s age is also four times Antonio’s age. How old is Sarah? Wilma and Fred’s earnings are modeled below: Wilma: f(x)= 0.15x + 6000 Fred: f(x)= 0.1x + 6500 How much must Wilma and Fred sell to earn the same amount? Solve A= 1 2 h(b1 + b2) if h=10, b1= 5x + 3 and b2= -2x + 8 There are two consecutive integers such that four times the smaller plus three less than twice the larger is 71.  What are the two integers?

DEFINITIONs A two-way frequency table is a useful way to organize data that can be categorized by two variables. Ex: Joint relative frequencies are the values in each category divided by the total number of values in the data set. Yes No Children 3 8 Adults 7 2 Yes No Total Children 0.15 0.4 0.55 Adults 0.35 0.1 0.45 0.5 1

How many male students are from the South? A college surveyed 3,500 students to determine which region of the US they were born in. The results are in the joint relative frequency table below. How many male students are from the South? How many female students are from the West or South? How may students are from the East and female? How many more students from the East are male than female? North South East West Total Male 0.19 0.08 0.05 0.51 Female 0.2 0.16 0.07 0.06 0.49 0.39 0.24 0.26 0.11 1

A book club has 200 members. Each member was asked whether he or she prefers fiction or nonfiction books. The results are shown below: Which statement is true? 74 members are 31-40 years old 12 members are 31-40 and prefer fiction 49 members are 21-30 years old 111 members prefer fiction Age Fiction Nonfiction Total 21-30 62 49 111 31-40 12 77 89 74 126 200

How many male students thought math was the most difficult subject? A school board surveyed 8,000 students in its district to determine which portion of the SAT was the most difficult: math, reading, or writing. The results are shown below: How many male students thought math was the most difficult subject? How many female students thought writing was the most difficult? How many more females were surveyed than males? How many more females thought math was a more difficult subject than writing? Math Reading Writing Total Male 0.15 0.17 0.47 Female 0.19 0.53 0.34 0.32 1

Predictions using tables Corn plants grow as tall as they will get in about 20 weeks. If the growth patterns continues, how high will the corn plant be beginning week 16? If the growth patterns was constant (at the same rate from week to week), how high was the corn in the beginning of week 9? Beginning Week Height (inches) 2 9 7 39 11 63 16 ??

KNIGHTS BASKEBTALL: Points Scored Player Game 1 Game 2 Game 3 Game 4 Joey 5 2 4 8 Jason 10 12 Brandon 6 Ned 1 3 Austin 7 David 9 Zac How many points did the Knights team score in game 1? How many more points does David score in game 3 than in game 1? How many points does Jason score in the first 4 games? Who would you expect to make the most points in game 5? What is the range of points you can expect Austin to score in game 5?

Study Guide Work Time Please use the solution station in the back. Your study guide is due Tuesday! All blocks- make sure you take pictures of the solutions so that when you are studying, you can check your answers! Raise your hand if you have any questions 