1. Graphing using Slope-Intercept Form
Once an equation is in the form y = mx + b, we can:
Find the slope
Find the y – intercept
Graph the equation (quickly!)
Y = ½ x + 2 2
Slope:
y – intercept: (0, )

2. Given a point (not an intercept) and the slope, write the equation of the line
Example 1: find the equation of the line through (1, 2) with a slope of -2.
Step 1: Plot the given point
Step 2: Use the slope to plot other points
Step 3: Draw the graph
Step 4: Use the graph to find the y-intercept and write the equation
y = -2x + 4
y = mx + b
y = -2x + b

3. Example 2 y = mx + b y = -1x + b y = -1x + 2
Find the equation of the line through (-2,4) with a slope of -1.
y = mx + b
y = -1x + b
y = -1x + 2