February 14th, 2010

This week we will be covering new investigations 1.3, 1.4, 2.1, 2.2, and 2.3 in "Moving Straight Ahead".  We will also be reviewing concepts from the beginning of the year using our CRCT Coach book.
  KEY STANDARDS: 

M7A3. Students will understand relationships between two variables.                                                                                                                 a. Plot points on a coordinate plane. 

b. Represent, describe, and analyze relations from tables, graphs, and formulas.                                                                                              c. Describe how change in one variable affects the other variable.  

d. Describe patterns in the graphs of proportional relationships, both direct (y=kx) and inverse (y=k/x)  

Vocabulary Words:
linear relationship-      relationships that are represented by straight lines on a graph
independent variable- located on the y-axis, time is the independent variable in the distant/time graph
dependent variable-    located on the x-axis, distance is dependent on time, so it's the dependent variable
x-intercept                   the point where the graph of an equation intersects the x-axis
y-intercept-                  the point where the line crosses the y-axis, or when x=0
coefficient-                  the number that multiplies a variable in an equation
properties of equality- to maintain an equality, you can add, subtract, multiply, or divide both sides of the                
                                         equality by the same number
point of intersection-  where two lines intersect on a graph
slope-                          steepness of a line is the ratio rise to run, or vertical change to horizontal change
Vocabulary test on Friday.
There will be a project next week.