# Ch. 2.4, 2.6, 2.7 Test Outline.

From Huben's Wiki

2.4 Writing Linear Equations

- Slope-Intercept Form
- Write an equation given a slope and any point.
- Write equations of lines perpendicular to other lines.

- Point-Slope Form
- Write an equation given two points.

- Convert anything into standard form,.
- Vertical and horizontal lines and their slopes.

2.6 Special Functions

- Constant and Identity Functions
- Piecewise Functions
- Absolute Value
- Greatest Integer (step)
- Any Old Piecewise Function

- Graph any of these.
- Domain and Range of any of these.

2.7 Graphing Inequalities

- Linear Inequalities
- Why are they linear?
- Why are they not equations?

- Related equations (boundary)
- Solid or dashed? Why?

- Graphing:
- Graph the boundary.
- Choose a point to decide which side to shade.
- What points can't we choose?

- Absolute Value Inequalities.