Download presentation

Presentation is loading. Please wait.

Published byConstance Erin Powell Modified over 8 years ago

1
**A3 2.4 Parallel and Perpendicular Lines, Avg. rate of change**

Homework: p 1-29 odd

2
**Slope and Parallel LInes**

If 2 non-vertical lines are parallel, they have the same slope. If 2 distinct non-vertical lines have the same slope, then they are parallel. Two distinct vertical lines, both with undefined slopes, are parallel. Guided Practice: Write an equation of the line passing through (-3,1) that is parallel to y = 2x + 1.

3
**Slope and perpendicular lines**

If two non-vertical lines are perpendicular, then the product of their slopes is a – 1. (the 2 slopes are negative reciprocals of each other) If the product of the slopes of 2 lines is a -1, then the 2 lines are perpendicular. A horizontal line having a slope of zero is perpendicular to a vertical line having undefined slope. Guided Practice: Write the equation of the line passing through (3,-5) and perpendicular to x + 4y – 8 = 0. Express your answer in general form.

4
Average Rate of change If the graph of a function is not a straight line, the average rate of change between 2 points is the slope of the line containing the 2 points. The line is called a secant line. Average Rate of Change: Example:

5
Whiteboard Practice Write an equation in slope-intercept form for the line parallel to y = - 5x + 4 and passing thru (-2, -7). Write an equation in slope-intercept form for the line perpendicular to x + 7y – 12 = 0 and passing through (5, -9) The graph of f passes through (-5, 6) and is perpendicular to the line that has an x-intercept of 3 and a y-intercept of -9. Write an equation in slope intercept form.

Similar presentations

© 2023 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google