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# Opener PowerPoint PPT Presentation

Opener. Please pick up the opener worksheet from the front of the classroom. Answers. Homework Questions. Notes: P.2. Linear models and rates of change. Linear Equations. Formulas. Can you…. Standard Form Point-slope Form Slope-intercept form. Graph? Find intercepts? Find the slope?

Opener

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### Opener

Please pick up the opener worksheet from the front of the classroom

## Notes: P.2

Linear models and rates of change

### Linear Equations

Formulas

Can you…

• Standard Form

• Point-slope Form

• Slope-intercept form

Graph?

Find intercepts?

Find the slope?

Change it into other forms?

### Slope

• Slope, , is the rate of change for the linear equation

• When , you get a horizontal line

• When is , you get a vertical line

### Parallel and Perpendicular Lines

Two distinct nonvertical lines are parallel if and only if their slopes are equal—that is, if and only if .

Two nonvertical lines are perpendicular if and only if their slopes are negative reciprocals of each other—that is, if and only if

### Technology Pitfall

When graphing on calculator, aspect ratio of screen is not square.

You can switch to square setting (Zoom 5) to make it square :-)