Download presentation

Presentation is loading. Please wait.

Published byBrian Harding Modified over 8 years ago

1
2-3C Finding an Equation of a Line 2-3C Finding an Equation of a Line Objectives: To write an equation of a line using the slope-intercept equation

2
The Slope-Intercept Equation y = mx + b slope y-intercept Create an equation of a line with a slope of -3 and a y-intercept of 4. y = -3x + 4 y = 4 – 3x 3x = 4 - y -4 = -y – 3x

3
The Slope-Intercept Equation Example 1 y = mx + b Create an equation of a line with a slope of -3 and a y-intercept of 4. y = -3x + 4

4
Example 2 Write an equation for the line with slope 3 that contains the point (-2,4) y = mx + b 4 = 3(-2)+ b 4 = -6 + b +6 10 = b y = 3x + 10 substitute solve for b simplify

5
Practice 1)m = 3; b = 2 2)m = ½; b = 4 3) (5,10); m = 4 Write an equation for the given line that contains the given point and has the given slope. 4) (-3,8); m = 2 1.Y = 3x + 2 2.Y = ½x + 4 3.Y = 4x 10 4.Y = 2x + 14

6
Example 2 Write an equation for the line containing the points (1,5) and (2,8).

7
m = 3 y = mx + b y = 3x + b 5 = 3(1) + b 5 = 3 + b 3 =3 2 = b y = 3x + 2

8
Example 3 Write an equation for the line containing the points (1,5) and (2,8). y = mx + b 5 = 3(1)+ b 5 = 3 + b -3 2 = b y = 3x + 2 substitute simplify

9
Practice 1) (-4,1) (-1,4) Write an equation for the line that contains the given points. 2) (-3,5) (-1,-3)

10
Assignment Worksheet 8-5, 2-32 even (NO mixed review)

Similar presentations

© 2022 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