Download presentation

Presentation is loading. Please wait.

Published byJudith Henry Modified over 6 years ago

2
WARM UP Evaluate the expression. 1.17 – 6 + 4 – 8 2.6 + 9 ÷ 3 + 3 3.4 5 – 2 6 4.9 6 ÷ 3 18 5.22 – 8 ÷ 2 3 5 Minutes Remain

3
WARM UP Evaluate the expression. 1.17 – 6 + 4 – 8 2.6 + 9 ÷ 3 + 3 3.4 5 – 2 6 4.9 6 ÷ 3 18 5.22 – 8 ÷ 2 3 4

4
WARM UP Evaluate the expression. 1.17 – 6 + 4 – 8 2.6 + 9 ÷ 3 + 3 3.4 5 – 2 6 4.9 6 ÷ 3 18 5.22 – 8 ÷ 2 3 3

5
WARM UP Evaluate the expression. 1.17 – 6 + 4 – 8 2.6 + 9 ÷ 3 + 3 3.4 5 – 2 6 4.9 6 ÷ 3 18 5.22 – 8 ÷ 2 3 2

6
WARM UP Evaluate the expression. 1.17 – 6 + 4 – 8 2.6 + 9 ÷ 3 + 3 3.4 5 – 2 6 4.9 6 ÷ 3 18 5.22 – 8 ÷ 2 3 1

7
WARM UP Evaluate the expression. 1.17 – 6 + 4 – 8 2.6 + 9 ÷ 3 + 3 3.4 5 – 2 6 4.9 6 ÷ 3 18 5.22 – 8 ÷ 2 3 0

8
4.4 Graphing Lines Using Intercepts Today’s Schedule: Lesson 4.4 Powerpoint Lesson 4.4 Powerpoint In class assignment/homework In class assignment/homework Exit Slip Exit Slip GOAL: Find the intercepts of the graph of a linear equation and then use them to make a quick graph of the equation. KEY WORDS: x-intercepts, y-intercepts, x-axis, y-axis.

9
4.4 Graphing Lines Using Intercepts An x-intercept is the x-coordinate of a point where a graph crosses the x-axis. A y-intercept is the y-coordinate of a point where a graph crosses the y- axis The y-intercept is the value of y when x = 0. Here, the y-intercept is 2. The x-intercept is the value of x when y = 0. Here, the x-intercept is 3.

10
4.4 Graphing Lines Using Intercepts EXAMPLE 1 Find an x-intercept Find the x-intercept of the graph of the equation 2x + 3y =6 SOLUTION To find an x-intercept, substitute 0 for y and solve for x. STEP ONE: Write the original equation2x + 3y = 6 STEP TWO: Substitute 0 for y2x + 3(0) = 6 STEP THREE: Solve for xx = 3 ANSWER> The x-intercept is 3. The line crosses the x-axis at the point (3,0)

11
4.4 Graphing Lines Using Intercepts EXAMPLE 2 Find a y-intercept Find the y-intercept of the graph of the equation 2x + 3y =6 SOLUTION To find a y-intercept, substitute 0 for x and solve for y. STEP ONE: Write the original equation2x + 3y = 6 STEP TWO: Substitute 0 for x2(0) + 3y = 6 STEP THREE: Solve for yy = 2 ANSWER> The y-intercept is 2. The line crosses the y-axis at the point (0,2)

12
4.3 Horizontal and Vertical Lines CHECK POINT Find Intercepts 1.Find the x-intercept of the graph of the equation 3x – 4y = 12 2.Find the y-intercept of the graph of the equation 3x – 4y = 12

13
4.4 Graphing Lines Using Intercepts SUMMARY Making a Quick Graph STEP ONE Find the intercepts. STEP TWO Draw a coordinate plane that includes the intercepts. STEP THREE Plot the intercepts and draw a line through them.

14
4.4 Graphing Lines Using Intercepts EXAMPLE 3 Make a Quick Graph Graph the equation 3x + 2y = 12 SOLUTION Find the intercepts. STEP ONE: Write the original equation 3x + 2y = 12 STEP TWO: Substitute 0 for y 3x + 2(0) = 12 STEP THREE: Solve for x x = 4 1

15
4.4 Graphing Lines Using Intercepts EXAMPLE 3 Make a Quick Graph Graph the equation 3x + 2y = 12 SOLUTION Find the intercepts. STEP ONE: Write the original equation 3x + 2y = 12 STEP TWO: Substitute 0 for x 3(0) + 2y = 12 STEP THREE: Solve for y y = 6 1

16
4.4 Graphing Lines Using Intercepts EXAMPLE 3 Make a Quick Graph Graph the equation 3x + 2y = 12 SOLUTION Draw a coordinate plane that includes the points (4,0) and (0,6). 2

17
4.4 Graphing Lines Using Intercepts EXAMPLE 3 Make a Quick Graph Graph the equation 3x + 2y = 12 SOLUTION Plot the points (4,0) and (0,6) and draw a line through them. 3

18
4.4 Graphing Lines Using Intercepts CHECK POINT Make a Quick Graph Graph the equation using intercepts. 1.2x + 5y = 10 2.x – 6y = 6 3.4x -5y = 20 YOU’RE CERTIFIED

19
4.4 Graphing Lines Using Intercepts CLASSWORK/HOMEWORK Page 225 #s 3 – 17 (You have to graph 9 – 14)

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