-3 -3x -3x -3 -3 -3 Objective- To identify the slope and y-intercept of a line in standard form. Standard Form Slope-Intercept Form y = mx + b Ax + By = C -3 3x + 2y = 8 y = x + 4 -3x -3x 2 2y = -3x + 8 -3 m = 2 2 2 -3 8 y = x + b = 4 2 2 -3 y = x + 4 2 To change Standard Form to Slope-Intercept Form just solve the equation for y.

-4x + 3y = 6 Graph the following equation. +4x +4x y +3 3y = 4x + 6 3 3 +4 4 6 y = x + 3 3 4 y = x + 2 3 x 4 m = 3 b = 2

-2x -2x -2 -1 -1 -1 Graph the following equation. 2x + 6y = 3 y 6y = -2x + 3 6 6 -2 3 y = x + 6 6 -1 1 y = x + 3 2 -1 x -1 +3 m = 3 1 b = 2

Graph the following equation. y = x y y = 1x + 0 m = 1 b = 0 +1 +1 x

Write a linear equation to describe this situation and graph. Ralph has $300 and is saving $25 a week. Let x = # of weeks Let y = savings in dollars Start value change y = 300 + 25x 500 400 300 200 100 y = mx + b Slope Y-intercept Savings m = $25 / week b = 300 0 1 2 3 4 5 Weeks

Pam received $100 and spends $4 each week. 1) Write an equation for the money, y, she has after x weeks. y = 100 - 4x 2) What are the slope and y-intercept? m = -4 b = 100