Challenge Problem (Exercise #4): A continuous function has a domain of -7 ≤x≤ 10 and has selected values
shown in the table below. The function has exactly two zeroes and a relative maximum at (-4,12) and a relative
minimum at (5,-6).
-7 -4 -1 0 2 5
-2 -5 -6
7 10
0 4
8
12 0
X
f(x)
(a)State the interval on which f(x) is decreasing.
(b)State the interval over which f(x) <0.
Closing: Summarize the key features of functions [domain, range, x-intercept, y-intercept, and local/global extrema.
Describe the significance of parenthesis and square brackets in interval notation.
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