Chapter 4: TE Graphs of Equations and Functions
Overview
Formulas and equations describe the relationships between quantities. Graphs represent them visually. This chapter emphasizes reading and interpreting graphs.
Suggested pacing:

The Coordinate Plane 
1hr 
Graphs of Linear Equations 
1hr 
Graphing Using Intercepts 
1−2hrs 
Slope and Rate of Change 
1−2hrs 
Graphs Using SlopeIntercept Form 
1/2hr 
Direct Variation Models 
1hr 
Linear Function Graphs 
1/2hr  ProblemSolving Strategies:

Use a Graph 
2hrs
If you would like access to the Solution Key FlexBook for evennumbered exercises, the Assessment FlexBook and the Assessment Answers FlexBook please contact us at teacherrequests@ck12.org.
ProblemSolving Strand for Mathematics
In this chapter, the problemsolving strategy is to Use a Graph. The examples and review questions encourage students to think about the data presented, to discuss reasonable tolerances for estimates, and to interpret graphs in reallife contexts.
Alignment with the NCTM Process Standards
The NCTM Process Standards in the use of graphs include portions of the communication, connections, and representation standards. One of the key requirements when constructing graphs is to organize and consolidate mathematical thinking in order to display the information accurately (COM.1). Graphing requires recognizing and using connections among mathematical ideas (CON.1) such as independent and dependent variables, appropriate scale when assigning values to the
 COM.1  Organize and consolidate their mathematical thinking through communication.
 COM.3  Analyze and evaluate the mathematical thinking and strategies of others.
 CON.1  Recognize and use connections among mathematical ideas.
 CON.3  Recognize and apply mathematics in contexts outside of mathematics.
 R.1  Create and use representations to organize, record, and communicate mathematical ideas.
 R.3  Use representations to model and interpret physical, social, and mathematical phenomena.
Chapter Outline
 4.1. The Coordinate Plane
 4.2. Graphs of Linear Equations
 4.3. Graphing Using Intercepts
 4.4. Slope and Rate of Change
 4.5. Graphs Using SlopeIntercept Form
 4.6. Direct Variation Models
 4.7. Linear Function Graphs
 4.8. ProblemSolving Strategies  Graphs