1. Cootie Catcher: Piecewise Graphing Vocabulary
Pair students.
Buddy A gets one cootie catcher.
Buddy B gets the other cootie catcher.
Using Buddy B’s cootie catcher, Buddy A picks a number.
Buddy B moves the cootie catcher vertical and/or horizontal x number of times (e.g., 2 – up then out).
Buddy A chooses to answer one of the four questions shown about the “Take a Hike” piecewise function.
Buddy B checks the answer by lifting the flap.
Repeat process with Buddy B.
Note: Once a question is selected, it cannot be selected again.
© 2010, Dr. Jennifer L. Bell, LaGrange High School, LaGrange, Georgia

2. Cootie Catcher or Fortune Teller – to fill-in on computer
domain of 5th piece
range of 3rd piece 1 2
3.5 ≤ x ≤ 5 or [3.5, 5]
Or 4 ≤ y ≤ 5.5
[4, 5.5]
interval(s) of remaining constant
f(0.25)
1 km
[1, 1.5] ∪ [2.75, 3.5]
or 1 ≤ x ≤ 1.5 &
2.75 ≤ x ≤ 3.5
Buddy A
3 km 5
How many pieces exist?
y=0
f(4)
(2.75 ≤ x ≤ 3.5
or [2.75, 3.5])
y = 5.5 3 4
equation of the 4th piece
y-intercepts
Cootie Catcher or Fortune Teller – to fill-in on computer

3. Cootie Catcher or Fortune Teller – to fill-in on computer
domain of 4th piece
range of 1st piece 1 2
or 2.75 ≤ x ≤ 3.75
[2.75, 3.75]
or 0 ≤ y ≤ 4
[0, 4]
interval(s) of increasing
f(1)
4 km
[0, 1] ∪ [1.5, 2.75]
or 0 ≤ x ≤ 1 &
1.5 ≤ x ≤ 2.75
Buddy B
1.5 km
3.5 ≤ x ≤ 5 or [3.5, 5]
Interval(s) of decreasing
x=0
f(4.5)
(1 ≤ x ≤ 1.5 or [1, 1.5])
y = 4 3 4
equation of the 2nd piece
x-intercepts
Cootie Catcher or Fortune Teller – to fill-in on computer