1. Warm UP -3 -4 Graph the line which passes through (3, 2) and has a
slope of 3
Warm UP 4 y +4
Steps
1) Plot the point. +3
2) Write slope as fraction
and count off other points. 3
m = 4 x -3
or m = -4
3) Draw line through points.

2. Note #6 Standards: 6.0 4.6 Using Slope Intercept Form
Objective- To use slope and y-intercept to graph lines. ESLRS: Academic Achievers, Critical Thinkers Pg.241

3. Objective- To use slope and y-intercept to
graph lines.
Graph the line which passes through (-2, 1) and has a
slope of -3. y
Steps
1) Plot the point.
2) Write slope as fraction
and count off other points. -3
m = -3 = 1 x -3 3
or m = -1 +1
3) Draw line through points.

4. Any linear equation which is solved for y is in
Slope-Intercept Form of the Linear Equation
y = mx + b
Any linear equation which is solved for y is in
slope-intercept form.
Find the slope and y-intercept of the following linear equations:
3) y = x - 4 5 5
b = -4
1) y = 3x + 4
m = 8 8
m = 3
b = 4
2) y = 5x
4) y = 6
m = 5
b = 0
m = 0
b = 6

5. -2 -3 Graph the following linear equation using slope and y-intercept.
Steps
1) Find the slope and y-intercept. +3
2) Plot the y-intercept. +2 x
3) Plot the slope. -2 2
m =
or m = -2 3 -3 -3
4) Draw line through points.

6. -1 -1 -2 Graph the following linear equation using slope
and y-intercept. y
Steps -2 +1
1) Find the slope and y-intercept. -1 +2
2) Plot the y-intercept. x
3) Plot the slope. -1 1
m =
or m = 2 -2
4) Draw line through points.

7. Slope-Intercept Form of the Linear Equation
Write and Graph a linear equation in the form
y = mx + b given the following.
1) m = 2, b = -3
4) m = 0, b = 6
y = 2x - 3
y = 6
2) m = , b = 5
5) m = , b = 0
3) m = , y-int.= 2
6) m = 1, b =

8. Write a linear equation in slope-intercept form
to describe each graph. y y x x
b = 3
b = -4
y = 2x + 3

9. Write a linear equation to describe this situation and graph.
Juan has $200 and is saving $50 a week.
Let x = # of weeks
Let y = savings in dollars
change
start value
y = 50x + 200
500
400
300
200
100
y = mx + b
Savings
Slope
Y-intercept
m = $50 / week
b = 200
Weeks

10. Pam received $100 and spends $4 each week.
1) Write an equation for the money, y,
she has after x weeks.
y = x
2) What are the slope and y-intercept?
m = -4
b = 100

11. Parallel Lines Graph the following on the coordinate plane.y x
Parallel lines have the same slope.

12. Tell whether the lines below are parallel.
1) 3x + y = y = -3x + 1
-3x x
y = -3x + 7
m = -3
y = mx + b
Same slope!
m = -3
Lines are parallel!