Download presentation

Presentation is loading. Please wait.

Published byStephon Quinton Modified over 3 years ago

1
M. Pickens 2006 Intercepts

2
M. Pickens 2006 Objectives To learn what intercepts are To learn how to find x and y-intercepts of a graph To learn how to find x and y-intercepts of an equation To use x and y-intercepts to sketch a graph

3
M. Pickens 2006 What are intercepts? An intercept is where something intersects or crosses For example, an x-intercept is where a line crosses the x-axis a y-intercept is where a line crosses the y- axis

4
M. Pickens 2006 Intercepts of a Graph What are the x- intercept and y- intercept of the graph at right? X-intercept: Y-intercept: Where it touches the x-axis x (5, 0) Where it crosses the y-axis y (0, 7)

5
M. Pickens 2006 Intercepts of a Graph What are the x- intercept and y- intercept of the graph at right? X-intercept: Y-intercept: Where it touches the x-axis x (-8, 0) Where it crosses the y-axis y (0, 6)

6
M. Pickens 2006 Intercepts of a Graph What are the x and y-intercepts of the graphs below? X-intercept: Y-intercept: X-intercept: Y-intercept: (3, 0) (0, -8) (-9, 0) (0, -5) Notice: For all the x-intercepts the y-coordinate is ____ For all the y-intercepts the x-coordinate is ____ 0 0

7
M. Pickens 2006 Which are which? Which of the coordinates below are x-intercepts? Which of the coordinates below are y-intercepts? R(3, 5)S(0, 9)T(-2, 0)U(0, 1)V(15, 0) W(0, 0) X( ½, 0) Y(0, 8)Z(1, 0.5) T, V, W, X S, U, W, Y

8
M. Pickens 2006 Intercepts of an Equation We know for an x-intercept the ______________ is 0 In the y-intercept the ___________ is 0 We can use this to solve equations. To solve for an x-intercept plug in a 0 for y. To solve for a y-intercept plug in a 0 for x. Y-coordinate x-coordinate

9
M. Pickens 2006 Intercepts of an Equation Find the x and y-intercepts of the equation -2x + 3y = 19 To find the x-intercept plug in 0 for _____ y -2x + 3y = 19 -2x + 3(0) = 19 -2x + 0 = 19 -2x = 19 -2 x = -9.5( -9.5, 0) To find the y-intercept plug in 0 for _____ x -2x + 3y = 19 -2(0) + 3y = 19 0 + 3y = 19 3y = 19 3 y = 6.3( 0, 6.3)

10
M. Pickens 2006 Intercepts of an Equation Find the x and y-intercepts of the equation To find the x-intercept plug in 0 for _____ y - 16 -16 5* *5 -80=-4x x = 20(20, 0) To find the y-intercept plug in 0 for _____ x y = 16(0, 16)

11
M. Pickens 2006 Sketching a Graph from Intercepts Find the intercept of the equation 3x + y =12 and sketch the graph X-intercept: (Plug in 0 for y) 3x + 0 = 12 3x = 12 x = 4 (4, 0) Y-intercept: (Plug in 0 for x) 3(0) + y = 12 0 + y = 12 y = 12 (0, 12)

12
M. Pickens 2006 Sketching a Graph from Intercepts Find the intercept of the equation and sketch the graph X-intercept: (Plug in 0 for y) x = 6 (6, 0) Y-intercept: (Plug in 0 for x) y = 0 – 3 y = -3 (0, -3) + 3 +3 2* *2

13
M. Pickens 2006 Conclusion Intercept is : _____________________ The x-intercept is _________________ The y-intercept is _________________ To find the x-intercept of an equation ____________________ To find the y-intercept of an equation ____________________ Where something intersects or touches Where a line crosses the x-axis Where a line crosses the y-axis Plug in 0 for Y Plug in 0 for X

Similar presentations

OK

Graphing Lines Test Review By Mrs. Anderson. Graph the following using slope and y-intercept Y=2x + 3 Y=3/4x – 7 Y=3/2x + 5 Y=4x.

Graphing Lines Test Review By Mrs. Anderson. Graph the following using slope and y-intercept Y=2x + 3 Y=3/4x – 7 Y=3/2x + 5 Y=4x.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on unity in diversity and organic farming Free ppt on arithmetic progression for class 10 Ppt on non biodegradable waste Ppt on needle stick injury report Ppt on quality education institute Ppt on email etiquette Ppt on diode as rectifier symbol Ppt on prime minister and his council of ministers Ppt on beer lambert law units Ppt on grease lubrication pump