Download presentation

Presentation is loading. Please wait.

Published byBrianna McWilliams Modified over 5 years ago

1
**3.7 Equations of Lines in the Coordinate Plane**

The slope m of a line is the ratio `of the vertical change (rise) to the horizontal change (run) between any two points.

2
Find Slopes of Lines Find the slope of line a and line d.

3
**Slopes of Lines in Coordinate Planes**

Negative slope – falls from left to right. Positive slope – rises from left to right. Zero slope (slope of 0) – horizontal line Undefined slope – vertical line

4
**Forms of Linear Equations**

The slope intercept form of an equation of a nonvertical line is y = mx + b, where m is the slope and b is the y-intercept. The point-slope form of an equation of a nonvertical line is y – y1 = m (x – x1), where m is the slope and (x1 , y1) is a point on the line.

5
Graphing Lines What is the graph of Starting point (0 , 1)

6
**Graphing Lines What is the graph of y – 3 = -2 (x + 3)**

Starting point (-3 , 3)

7
**Writing Equations of Lines**

What is an equation of the line with the slope 3 and y – intercept -5? y = mx + b y = 3x – 5

8
**Writing Equations of Lines**

What is the equation of the line through point (-1 , 5) with slope 2? y – y1 = m (x – x1)

9
**Using Two Points to Write an Equation**

What is an equation of the line with points (-2 , -1) and (3 , 5)?

10
**Writing Equations of Horizontal and Vertical Lines**

What are the equations for the horizontal and vertical lines through (2 , 4)? y = 4 – horizontal line x = 2 – vertical line

11
More Practice!!!!! Homework – textbook p. 194 # 8 – 36 even.

Similar presentations

Presentation is loading. Please wait....

OK

Lesson 1-3 Formulas Lesson 1-3: Formulas.

Lesson 1-3 Formulas Lesson 1-3: Formulas.

© 2019 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