Alice's Math: Concepts for April 13th

Thursday, April 13, 2017

Concepts for April 13th

Algebra I

Today we discussed
We did a full review of all things functions and graphs and put it all together. From there, we moved to systems of equations, and for the sake of this course, they will be two lines. There are three possibilities for two linear equations.

The lines may cross at a single coordinate point. This point will make both equations true at the same time!
The lines may not cross at all. Said another way, the lines may be parallel. Recall that parallel lines have the same slope, but a different y-intercept.
The lines might intersect infinitely many times, or at every point on the same line. In this case, we really have equations that represent the same line.

Sections Covered in Textbook
1) 11-2: Graphing Systems of Equations (pages 442-446)

Video Tutorials
1) Solving Systems of Equations by graphing

Assignments
1) Pages 445-446 #'s 17-32 1st column, 43.
2) Complete Test on Functions and Graphs.
Download a copy of the test here.

**PLEASE CHECK ODD ANSWER IN BACK OF TEXTBOOK

Pre-Algebra

Today we discussed
No discussion of graphing is complete without slope. Slope or steepness is how quickly something rises or falls compared to (or divided by) how far something travels. It is the rise of line divided by the run, or the change in y-values divided by the change in x-values. Positive slopes start low at the left and rise as they move right, and negative slopes are just the opposite - they start high and end lower.