Consider the function defined by

Source: The Mathematics Teacher.
a. Graph the function on [-6,6] by [-6,6]. From your graph, estimate how many x-intercepts the function has and what their values are.
b. Now graph the function on [-1.5, -1.4] by [-10-4,10 -4] and on [1.4, 1.5] by [-10-5, 10-5]. From your graphs, estimate how many x-intercepts the function has and what their values are.
c. From your results in parts a and b. what advice would you give a friend on using a graphing calculator to find x-intercepts?
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