Download presentation

Presentation is loading. Please wait.

Published byJoseph Earl Scott Modified over 6 years ago

1
**4-2 Writing Linear Equations Given Two Points**

Goal: Write the equation of a line in slope-intercept form given 2 points on the line. Eligible Content: A / A / A / A / A / A / A

2
**Steps: Find the slope using the slope formula:**

Find the y-intercept using y = mx + b Write equation by plugging slope and y-intercept into y = mx + b.

3
**Find the equation of the line that passes through the points (1,6) and (3, -4).**

Slope: y-intercept: pick either point 6 = -5 ‧ 1 + b 6 = b = b Write equation: y = –5x + 11 If I pick the other point, I will get the same answer: -4 = -5 ‧ 3 + b -4 = b 11 = b

4
Examples Write the equation of the line that goes through each set of points. (-3, 1) and (5, 5) (2, 3) and (3, 0) (-4, -3) and (2, 9) y = ½ x + 2.5 y = – 3x + 9 y = 2x +5

5
The table of ordered pairs shows the coordinates of two points on the graph of a line. Which equation describes the line? A. y = –x + 4 B. y = x + 4 C. y = x – 4 D. y = –x – 4

6
**Write the equation of the line that passes through the points (–2, –1) and (3, 14).**

A. y = 3x + 4 B. y = 5x + 3 C. y = 3x – 5 D. y = 3x + 5

7
Practice Page 229 #5-8

8
Homework Page 229 #16-21

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