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