Warm Up Unit 1 Review  is a term used in geometry to describe a function that moves an object a certain distance. The object is not altered in any other way. It is not rotated, reflected or re-sized. True or False: Under the translation rule the point (2,5) will become (5,7) Create a small graph on your paper, plot the points (1,4), (5,3), and (2,2). Now translate the figure 5 units left and 2 units down. What is the translation rule for this move?

Two Way Tables

Standards MCC8.SP.4 Understand that patterns of association can also be seen in bivariate categorical data by displaying frequencies and relative frequencies in a two-way table. Construct and interpret a two-way table summarizing data on two categorical variables collected from the same subjects. Use relative frequencies calculated for rows or columns to describe possible association between the two variables

Essential Question How do we organize categorical data?

Vocabulary Joint frequencies- Entries in the body of the table Marginal frequencies- Entries in the “Total” row and “Total” column Relative frequencies- How often something happens divided by all outcomes Conditional frequencies- The frequency of outcomes divided by the row or column total

After this lesson You will be able to construct and interpret a two way table comparing bivariate data

Comparing Data How can we compare and show student’s favorite social media sites? What are the variables we are comparing? (Bivariate data) Students and Social Media Sites

Create a table comparing students and their favorite social media site Use the following sites: Facebook, Instagram, Twitter, and Tumblr This is how we have displayed data so far, in a one way table. Facebook Twitter Tumblr Instagram Students

Creating a two way table At this point, we are comparing students vs. favorite social media sites, how can we change the subjects we are comparing to two categories?

Two-way table Facebook Twitter Instagram Tumblr Total Male Female

Using the information in the table we created, find the following: Joint Frequencies Marginal Frequencies Relative Frequencies Conditional Frequencies