 # Y = -2x + 1 x y xy -2 0 1 2 -2(-2) + 1= 5 -2(0) + 1 -2(1) + 1 -2(2) + 1 -2(-1) + 1 Ordered Pair (-2, 5) (-1, 3) (0, 1) (1, -1) (2, -3) Where is the “y-intercept”?

## Presentation on theme: "Y = -2x + 1 x y xy -2 0 1 2 -2(-2) + 1= 5 -2(0) + 1 -2(1) + 1 -2(2) + 1 -2(-1) + 1 Ordered Pair (-2, 5) (-1, 3) (0, 1) (1, -1) (2, -3) Where is the “y-intercept”?"— Presentation transcript:

y = -2x + 1 x y xy -2 0 1 2 -2(-2) + 1= 5 -2(0) + 1 -2(1) + 1 -2(2) + 1 -2(-1) + 1 Ordered Pair (-2, 5) (-1, 3) (0, 1) (1, -1) (2, -3) Where is the “y-intercept”? (0, 1) x-y chart and slope/y-intercept: -2 1 = 3 = 1 = -1 = -3 Warm-Up

Objective: Given an equation, students will be able to (1) identify the slope, y- intercept, and (2) graph the line using the slope and y-intercept. CA Standards 3.3: Graph linear functions, noting that the vertical change (change in y-value) per unit of horizontal change (change in x-value) is always the same and know that the ratio (“rise over run”) is called the slope of a graph. Agenda: 10/05/11 1.) Warm-up 2.) Lesson Slope Intercept Equations ppt. 3.) Class/Homework WS Graphing y = mx + b 4.) STAY ON TASK!!!

Slope-Intercept Equations y = mx + b Slope y-intercept Example: Slope(m) = -4 y-intercept(b) = -8

Find the slope and y-intercept of each equation: Slope (m) y-intercept EQUATION 1 1+0

x y y-intercept (b) = 3 Graph the line using y-intercept and slope. Slope (m) = -2 1 1 RISE RUN y = mx + b begin here! move Example 1: begin at y = 3 =

Example 2: x y

x y y-intercept (b) = 3 Graph the line using y-intercept and slope. Slope (m) = 4 4 RISE RUN y = mx + b begin here! move Try This: begin at y = 3 = Let’s see your skills!

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