6.5 Negative Reciprocal v Negative Inverse

Great work yesterday!  I hope you were able to write some solid answers on questions #20 and #30 of the homework.  Regarding math vocabulary, I should be more specific with my own choice of words:

• When we are finding the slope of a line that is perpendicular to a given line, the textbook says to use the negative reciprocal.  I use the term negative inverse at times in the videos.  They are both ways of saying the same thing.
• The important thing is that you know to find the negative reciprocal (inverse).  

• An example would be:
• y = mx + b  where m = 5/1 , the negative reciprocal would be -1/5 (note the negative in front) not just 1/5 and not -5/1.  

• If you started with a negative slope it would become positive when you make an equation for the perpendicular line.  
• y = mx + b where m = -1/3, the perpendicular line would have a slope of 3/1 (positive)

As always, ask questions if that is unclear.  Thanks!

6.5 Equations w Parallel & Perpendicular Lines

Here are the links for 6.5:

6.5 Parallel Lines (Intro)

6.5 Write an Equation of a Parallel Line

6.5. Perpendicular Lines (Intro)

6.5  Write an Equation of a Perpendicular Line


Here is the HW assignment for 6.5:

6.5 pp 357-358  #3,5,7,20*,21,23,25,30* 

On questions #20 and #30, please explain your thinking using appropriate math vocabulary, visuals as needed and complete sentences.


#32-34 can also be done as extra credit and there will be a challenge activity for lines on a square.

6.5 Preview @HomeTutor on classzone.com

First day back was a little busier than I expected.  I have been unable to make a video for section 6.5 but there is a version at classzone.com  

I've used a screen recording to show you how to get to it.  Although I start by saying you need to set up an account to access it, you do not.  About a minute into the screen recording you can just click on @HomeTutor to access their videos:

Preview 6.5 @HomeTutor on classzone.com

There are no homework problems tonight.  We will work on them as classwork tomorrow.

Thanks for your patience as I learn all Mr. Mejia's instructional tools:)

Day 1 with Mr. Adams - Welcome Back!

Hello Algebra Students,

Hope you all had a wonderful winter vacation and enjoyed the holidays with your family and friends.

I am looking forward to teaching you while Mr. Mejia is out on paternity leave through the February break.  Although some things will be different about how I teach Algebra Concepts, I'm planning to keep more things the same for you during this time.  Using this blog and providing video lectures in advance of the classwork are two ways I hope to do this.

Today we will start by answering some questions about how you learn math: 

Concepts Survey

Then we will explore some of the basic concepts of how and why we use algebra to solve real-world math problems.  

Your homework will be to watch a video of tomorrow's lecture so we can do some problem-solving together in class. This will provide me with opportunities to help answer any questions you have.

You may choose to start with a review of slope.

Thank you for welcoming me to your classroom:)

Sincerely,

Mr. Adams