Download presentation

Presentation is loading. Please wait.

1
**Writing an Equation of a Line**

Determine the equation of a line and/or graph a linear equation.

2
**Slope-intercept Form y = mx + b**

any ordered pair (x,y) Slope-intercept Form y = mx + b Slope y-intercept

3
**The method used to write an equation of a line depends **

on the information about the line that is available.

4
**If given the slope and y-intercept,**

slope-intercept form. Example m = 5, b = 7 5 7 y = ___ x + ___

5
**If given a point and the slope,**

Example m = –2, contains (5, –8) Step 1 Substitute –2 for m, 5 for x, and –8 for y; then simplify to find the value of b. y = mx + b –8 = –2(5) + b –8 = –10 + b 2 = b Step 2 Substitute –2 for m, and 2 for b. y = –2x + 2

6
**If given two points, First, find the slope using the slope formula.**

Example contains (5, –8) and (2, 7) m = 15 –3 m = –5 m = 7 – -8 2 – 5

7
**If given two points, continued**

Then use the slope you just found and EITHER point to work like the previous example. y = -5x + b 7 = -5 (2) +b 7 = b 17 = b m = –5, contains (5, –8) and (2, 7) y = –5x + 17

8
Parallel lines

9
**you try Find the equation of each line using the given information.**

m=2, y-intercept is -1 the line passes through the points (8, 2) and (12, 4) the line is parallel to the line y = ⅔x + 4, and passes through the points (6, 7)

Similar presentations

© 2021 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