WelcomeMaterials needed: journal, pencil, calculator

and homework

1. Identify the independent and dependent variable.2. Identify the rate of change (remember your units).

Bell Ringer(5 minutes)

Objective: SWBAT calculate, using technology, the correlation coefficient and interpret this quantity as a measure of the strength of the linear association.

Essential Question: How does the correlation coefficient tell me what kind of relationship it is?

In your Cornell Notes(15 minutes)

Scatter Plot: a graph used to identify a potential trend

Linear Regression: method on graph calc. used to find the line of best fit to represent the data

Vocabulary

Association: the correlation/relationship between two variables

Example: # of mailboxes in a city increases and # of firefighters in city increases

Do you think that one causes the other?◦ Why do you think this positive trend occurs?

Vocabulary

Causation: change in one quantity causes a change in another

Example: # of shirts ordered and the total cost

How does the number of shirts ordered affect the cost?

Vocabulary

Residual: difference between y-value on scatter plot and predicted y-value (on the line of best fit)

Vocabulary

Foldable

You and your desk partner will work on your assigned problem.

The correlation coefficient and equation have already been given to you. Answer the questions based on the given data.

Don’t forget to draw the scatter plot!

Correlation Coefficient (SG)10 minutes

Jigsaw/WG answers (SG/WG)10 minutes

In your foldable, label the axes for each type of correlation.

Remember, x-axis is independent variable and y-axis is dependent variable.

Example:

Create Situations (Individual)10 minutes

# of times teeth flossed per week

# of cavities

Go back through today’s notes and highlight vocabulary.

Create questions on the side that our notes answer.

Summarize at the end of notes (3-4 complete sentences).

Finishing Cornell Notes (Individual)10 minutes

With a partner or on your own, work on the assigned homework. Look back at your notes!

Homework (SG/Individual)(10 minutes)