# 4.2Graphing Horizontal and vertical lines.doc - bmass

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```					Algebra : Graphing Horizontal and Vertical Lines

I.      Objectives
A. Graphing Horizontal Lines
B. Graphing Vertical Lines

II.     Discuss some Key Terms
A. Cartesian Plane
B. Axes
i.       Horizontal (x-axis)
ii.      Vertical (y-axis)

C. Points
i.            Ordered Pair
ii.           (x,y)

III.   Warmup
Give the coordinates of the following points.

1.   C_______
C
2. F_______                                             E

3. I_______

4. E_______                                                     H                            G
-10
5. The point in quadrant IV
Closest to the x-axis.________                                                                        J

D                        F
I

IV.     Graph the following set of points
A. (2,1) (2, 5), (2, -3), (2, 0)

B. (-3, 0), (-3, -3), (-3, 2), (-3, 5)

C.   (1, 1), (1, 3), (1, -4)
D.   Do you find something in common with Examples A-C?
E.   If you had to call these Horizontal Lines or Vertical Lines, which one would you choose?
F.   The equation for Example A:
G.   The equation for Example B:
H.   The equation for Example C:
V.      This was only the one type of line, what is the other type of line?
A. Could you give me a set of points to try and get a picture of this other type of line?

B. How would you write an equation for this one?

VI.     If given the point (2, 3), could you write an equation of a horizontal line that passes through
that point?

VII.    If given the point (-1, 0), could you write an equation of a vertical line that passes through that
point?

VIII.   Given the equation, x = 2,
A. is the point (2,3 ) on that line?

B. is the point (3, 2) on that line?

```
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