4 Objectives:Represent quantitative relationships graphically and interpret the meaning of a specific part of a graph in the situation represented by the graph. (AF 1.5)Graph linear functions noting that the vertical change per unit of horizontal change is always the same and know that the ratio is called the slope of a graph. (AF 3.3)
5 Slope- Intercept Form y = 2x + 3 Slope Y- intercept Slope tells you the “steepness” of a line.For example – 2(up 2, over 1)Y-intercept tells you the starting point of your line.For example – (0,3)Click here for more.
6 Identify slope and y-intercept. 1.4.m= 3 b = 5m= b = 42.5.m= b = -6m= b = 06.3.m= 0 b = 4m= ¼ b = -1
7 Slope-Intercept FormUse the slope and y-intercept to write a linear equation in slope-intercept form.1.m= b = 64.m= -⅓ b = 1Y = -⅓x + 1Y = -2x +62.5.m= 4 b = 0m= ⅛ b = 3Y = 4xY = ⅛x + 36.m= 1 b = 63.m= 0 b = -5Y = 1x + 6Y = -5
8 Graphing Slope-Intercept y = 2x + 31. Y-intercept is your starting point. Start at (0, 3)2. Use slope to create line. Up 2, to the right 1.3. Connect the points with a line.
9 Graphing Slope-Intercept 1. Starting point?2. Use slope3. Connect the points