CPM Homework Help : PC3 Problem 2-85

Periodic linear graph, x axis scaled from negative 6 to 6, with 5 visible turning points: (negative 4, comma 2), (negative 2, comma negative 2), (0, comma 2), (2, comma negative 2), (4, comma 2), & (6, comma negative 2). X intercepts at negative 5, negative 3, negative 1, 1, 3, & 5. Consider the “saw tooth” graph at right.

What is the amplitude?
Hint (a):
The maximum points are at $y=2$ . The minimum points are at $y=−2$ . What is half the distance between these points?
What is the period?
Hint (b):
The period is the horizontal distance to complete one cycle.
State the domain and range.
Answer (c):
D: all real numbers; R: $−2\le y\le2$
What are the $x$ -intercepts of the function? Express your answer as an equation.
Hint (d):
... $-5,-3,-1,1,3,5$ , ...