GEO: 3-6 QC (Lines in Coor. Plane)
1.  Which equation is written in slope-intercept
     form below?
2x + 9y = -36
y - 5 = 2(x - 8)
y = x2
y = -4x + 3
2.  Which equation is written in point-slope     form below?
2x + 9y = -36
y - 5 = 2(x - 8)
y = x2
y = -4x + 3
3.  Which equation below represents a vertical
     line?
y = 6
y - 5 = 2(x - 8)
x = -10
y = -4x + 3
4.  Which equation below represents a horizontal     line?
y = 6
y - 5 = 2(x - 8)
x = -10
y = -4x + 3
5.  What is the equation of the line that has a slope
     of 6 and contains (3, -4) in point-slope form?
y = 6x - 22
y - 4 = 6(x + 3)
y + 4 = 6(x - 3)
y + 4 = -6(x + 3)
6.  What is the equation of the line that has a slope     of 6 and contains (3, -4) in slope-intercept form?
y = 6x - 22
-6x + y = -22
y + 4 = 6(x - 3)
y = 6x - 4
7.  What is the equation of the line, in slope-
     intercept form, that contains the points
     (-1, 0) and (1, 2)?
y = -x - 1
y = x + 1
y = -x + 1
This is a line with
    an undefined slope.
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
8.  Drag the equation to
     the correct line.
no line to represent:
x = -3
?
y -2 = .5(x - 2)
?
y = .5x - 2
?
y = -3
?
A
B
C
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
9.  Drag the correct
     equation to the 
     line it
     represents.
y - 3 = -2(x - 0)
?
A
x = 2
?
B
C
equation
not graphed:
y = 2x - 1
?
y = 2
?
10.  Which type of lines do the equations below
      represent?
parallel lines
intersecting lines
y = -2x - 5   and    y + 4 = -2(x - 8)
perpendicular lines
coinciding lines
11.  Which type of lines do the equations below      represent?
parallel lines
intersecting lines
y = -2x - 5   and    y = 5x + 2
perpendicular lines
coinciding lines
12.  Which type of lines do the equations below      represent?
parallel lines
intersecting lines
y = -2x - 5   and    2y = -4x - 10
perpendicular lines
coinciding lines
13.  Which type of lines do the following equations
      represent?
parallel lines
intersecting lines
y = ⅓x+9      and      y=-3x+8
perpendicular lines
coinciding lines
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