1. GRAPHINGGRAPHING
LINESLINES
Algebra 1Algebra 1
Summer 2013Summer 2013
Mr. SaucedoMr. Saucedo

2. OBJECTIVESOBJECTIVES
Today we will leran:Today we will leran:
• How to graph a line given one point and slope.How to graph a line given one point and slope.

3. GRAPHINGGRAPHING
• Some linear equations have one variable.Some linear equations have one variable.
Examples: y=-1 and x=4.Examples: y=-1 and x=4.

4. Y = CY = C
Where c is a constant.Where c is a constant.
• This type of of graphs is a horizontal line.This type of of graphs is a horizontal line.
Examples:Examples:

5. X=CX=C
where c is a constantwhere c is a constant
• This type of of graphs is a horizontal line.This type of of graphs is a horizontal line.
Examples:Examples:

6. CheckpointCheckpoint
• Graph the lines of the equations:Graph the lines of the equations:
a.a. y=-3y=-3 b. x= 2b. x= 2

7. CheckpointCheckpoint
• What are the equations of the lines in this graph?What are the equations of the lines in this graph?
Blue line:Blue line:
Red line:Red line:

8. GraphingGraphing
with two pointswith two points
• Graph the line that has the following two points:Graph the line that has the following two points:
(-5, 2) and (0,3)(-5, 2) and (0,3)
-What is the slope?-What is the slope?
What are theWhat are the
X and Y intercepts?X and Y intercepts?

9. CheckpointCheckpoint
• Graph the line that goes through the pointsGraph the line that goes through the points
(3,2) and (6, -4)(3,2) and (6, -4)
What is the slope?What is the slope?
What are the x and yWhat are the x and y
intercepts?intercepts?

10. GraphingGraphing
with one point and slope.with one point and slope.
• Graph the line that has a slope of 3/2 and goesGraph the line that has a slope of 3/2 and goes
through the point (1,2).through the point (1,2).

11. GraphingGraphing
with one point and slope.with one point and slope.
• Graph the line that goes through the point (0,-3)Graph the line that goes through the point (0,-3)
and that has a slope of -1/2.and that has a slope of -1/2.

12. Checkpoint.Checkpoint.
• Graph the line that has a slope of -3 and thatGraph the line that has a slope of -3 and that
goes through the origin.goes through the origin.

13. CheckpointCheckpoint
• Graph the line that goes through the pointGraph the line that goes through the point
(-2, 3), with a slope of -3/2(-2, 3), with a slope of -3/2

14. CheckpointCheckpoint
• Graph the line that goes through the pointGraph the line that goes through the point
(-3, 5) with a slope of 0.(-3, 5) with a slope of 0.

15. Checkpoint.Checkpoint.
• Draw a line that goes through the point (4,3)Draw a line that goes through the point (4,3)
and with an undefined slope.and with an undefined slope.

16. Individual practice.Individual practice.
1.1. Graph the line of the equation y=1/2Graph the line of the equation y=1/2
2.2. Graph the line of the equation x= -7Graph the line of the equation x= -7
3.3. Graph the line that goes trough the pointsGraph the line that goes trough the points
(0,0) and (3,3).(0,0) and (3,3).
4.4. Graph the line that goes through the pointsGraph the line that goes through the points
(2,3) with slope -2/5(2,3) with slope -2/5
5. Graph the line that goes through the points5. Graph the line that goes through the points
(5,-1) with slope -3(5,-1) with slope -3