Wednesday, March 21, 2007
Algebra (Class 62)
Overview
Today we continue to work with graphs of lines. In particular we focus on finding the slope, y-intercept, and x-intercept when given two points on a graph by using triangles and our skills for working with ratios.
Textbook Sections
§8-3(Txt. p.360) Slope of a Line
§8-4 (Txt. p.366) The Slope-Intercept Form of a line.
Key Attitudes
Mathematics is about generalizing and applying patterns.
Key Ideas
The slope of a line can be found by finding the ratio of the change in y to the change in x.
The change in y and change in x can be found by subtracting the corresponding y-values or corresponding x-values.
For lines the slope is the same no matter what two points on the line you pick.
The y-intercept can be found by using the slope to “move to” the y-axis.
Key Skills
Finding the slope of a line given two points.
Finding the x-intercept or y-intercept using triangles.
Finding missing values in a ratio.
Adding and subtracting fractions.
Handouts
No Handouts Posted
Assignment
Practice Worksheet
Disclaimer- The assignment as stated in class is the official assignment. Every effort is made to keep this posting accurate, but you should refer to what was stated in class as the final word.
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