Graph the following Y = 4 X = 3 Y = -5x + 2 6x + 3y = 9.

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Presentation transcript:

Graph the following Y = 4 X = 3 Y = -5x + 2 6x + 3y = 9

Today’s Objectives By the end of class today, you will be able: to find the x- and y-intercepts of a graph when given a linear equation. To use intercepts in order to graph a linear equation

Chapter 8.3 day 1 Vocabulary: x-intercept: the x-coordinate point where a graph crosses the x-axis. y-intercept: the y-coordinate of a point where a graph crosses the y-axis.

Finding x-and y-intercepts from a graph:

Finding x-and y-intercepts from a graph:

Finding x-and y-intercepts from a graph:

What do we notice about…… Coordinates on the x-intercept? Coordinates on the y-intercept?

Finding x-and y-intercepts from a linear equation: 3x – 2y = 6

Finding x-and y-intercepts from a linear equation: X – 2y = -2

Finding x-and y-intercepts from a linear equation: 4x + 3y = 12

Finding x-and y-intercepts from a linear equation: Y = -2x - 8

Using intercepts to graph a linear function Graph: 4x + 2y = 12 Step 1: Step 2: Step 3:

Using intercepts to graph a linear function Graph: 3x + y = 9 Step 1: Step 2: Step 3:

Using intercepts to graph a linear function Graph: -2x – 6y = 12

Practice Makes Perfect! ONLY find the x- and y-intercepts of the following: 1.) 5x – 20y = 40 2.) -3x + 12y = 24 GRAPH the following: 3.) 4y – 2x = 12 4.) y = 3x + 9

Homework Page 400 #’s 10-18, 21-26