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December 7, 2012Slope Intercept Form
Warm-up:Find the slope of the line that goes through (3, -2) and (4, 7).
Quiz Tuesday!HW 5.3: Pg. 275 #20-5, 29-39 odd, #58-60
5.3 Slope Intercept FormOne way to write an equation of a line.
y = mx + bm =
b =
Another way to find the equation without making a table…
• Identify the slope and y-intercept, then put it in Slope Intercept Form
y = mx + bm =
b=
Identify the slope and y-intercept, then write the equation of the line.
slope = y-int = slope = y-int =
Equation:Equation:
Let’s go the other way now!Using Slope Intercept Form to graph a line.
Example 1: Identify the slope and y-intercept
To graph:1. Start at y-intercept2. Use the rise and run to find the next point3. Draw the line that goes through those two points
22
3 xy
y
x
5
5
-5
-5
More Practice!
1. y = 3x + 2 2.Slope = y-int =
slope = y-int =
Rewriting in Slope Intercept Formy = mx + b
Graph 2x + 4y = 6