# Use Slope Intercept Form

4.2 Notes (Pg. 232-239)
Name: ___________________________________________
Use Slope-Intercept Form
Algebra 1
Date: _____________
Hour: _____
Objectives
Writing an Equation of a Line in
 Write an equation of a line using points on the line.
Slope-Intercept Form
 Model a real-life situation with a linear function.
Step 1: Identify/Find the slope m.
Step 2: Identify/Find the y-intercept.
Step 3: Write an equation using
.
Example1
Write an equation given the slope and a point
Write an equation of the line that passes through the point
and has a slope of
.
Example 2
Write an equation given two points
Write an equation of the line that passes through
and
 Check Point
1.
Write an equation of the line that passes through
and
.
How to Write Equations in Slope-Intercept Form
Given two points
Given slope m and y-intercept b
Given slope m and one point
Use the points to find the slope
Substitute _____ and _____ in the
Substitute _____ and the coordinates
_____. Then follow the same steps
equation
.
of the point in
. Solve
described at the left.
for _____. Write the equation.