5.2 Writing Linear Equations from Tables

HomeworkIt’s time for more practice in finding equations for lines! Yesterday, you practiced writing equations from situations. How can you extend that knowledge and skill-set to find linear fits to data in tables? Can you write your equations without graphing first?

How can you apply your recent calculator skills to check your work? If you need help in setting these problems up on the Nspire handhelds, see Mr. Dunn before school or during lunch.

Practice problems for this section (Due at the beginning of class on Wednesday) are:

9, 12, 13, 15

The Science of Luck

Math in the newsAre you lucky? Good luck? Bad luck?

Before we move too far away from our discussions of probability and statistics, consider this. Is there such a thing as luck, or is luck just something you think happens because of how you perceive the world around you? Does your brain control your luck by preventing you from seeing things around you or making some things more apparent?

Popular science investigates the science of luck in this article.

So what do you think? Is luck real, or can everything be explained away by science?

Quizlet: Do you Quizlet?

UpdatesI’ve created a Quizlet class that you may join where I’ll occasionally post sets of flash cards you may use to practice new math vocabulary and test yourself with problems.

If you already have a Quizlet account, just click on this link to find the class and join it. If you don’t already have an account, when you click, you’ll need to sign up before you can join the class. You may want to have a parent help you sign up.

There are Quizlet apps available in the iTunes Store for iOS devices and the Google Play Store for Android devices. You may also interact with Quizlet on the website.

Data in Real Life: The Middle Class

Math in the newsNPR’s Planet Money featured this story that posed the question “What is the middle class in your city?”

Box and Whisker Plot
Box and Whisker Plot—Identify the median, quartiles, and extreme values

Since we’ve recently talked about box and whisker plots as well as biases, take a look at the data presented in the article. How is it similar to a box and whisker plot? How is it different?

Do you think there may be biases in the way the data was collected? Does the article indicate any of these biases? Can you depend on article authors to identify biases in the data they reference? Can you trust that the data presented is factual?

Read the full article here

After reading the article and examining the data, is the student’s assertion accurate?

5.3 Linear Relationships and Bivariate Data

HomeworkTry problems 1-6 in guided practice tonight. You may need to refer to chapter 5.3 in your green books.

On Friday, you’ll need to complete 9-13, 15, 17, & 18.

There will be no homework check on Friday. All problems assigned from chapter 5.3 should be completed  and checked before class on Monday. Don’t forget to check odd answers in the back of your book. Be ready with questions when you come to class. You should have many!

5.3 Even Answers

Exploring Bivariate Data

Explore MathWe’re trying a Math Nspired™ lab provided by Texas Instruments today and tomorrow.

Would you like to try this at home? If you have a TI nSpire calculator you can download the tns file to your handheld or to the Nspire app on your iPad and try this any time. You can also try the student software free for 30 days using the link on the Resources page.

Maybe your parents would like to give it a try!



Even if you don’t have access to an Nspire calculator, you can now examine the plotted data from this exercise! The plots (with any luck even numbered correctly) are posted below.


Rating your weather forecast

ProjectsThis 6 weeks, students will be studying probability and statistics. How fortunate, then, that we can use the crazy weather of north Texas as the backdrop for this project.

Students will collect data in the form of forecasts each day for 14 consecutive days. They will then verify the actual conditions of the days they found forecasts for. As students learn how to analyze data, they will devise a method to score the forecast they chose.

The intro document for this project (with updated schedule of due dates thanks to snow days and a mis-printed calendar) is below.

Predicting The Weather Forecast

Data Analysis Guide and Rubric

Final presentation rubric


Welcome to 7th Grade Pre-AP Mathematics with Mr. Dunn!

Here you will find assignments, project guides, and answers to even numbered questions from the assignments. Always remember to come to class prepared. You should have pencil, paper, completed assignments, and a list of any questions you have over recent work.

Here’s to a great year!