1.
Graph bymaking a table of values. x f(x) –4 5 Answer: –3 –4 –2 –3 –1 2 0 5 1 0 2 –19
2.
Determine consecutive values of x between whicheach real zero of the functionis located. Then draw the graph. change in signs means x f (x) the x-axis was crossed –2 9 change in signs –1 –1 change in signs 0 1 change in signs 1 –3 2 –7 change in signs 3 19 There are zeros between x = –2 and –1, x = –1 and 0, x = 0 and 1, and x = 2 and 3.
4.
Graph Estimate thex-coordinates at which the relative maximum andrelative minimum occur. x f (x) –2 –19 –1 0 0 5 1 2 2 –3 3 –4 4 5 5 30 relative maximum at about x = 0 relative minimum at about x = 3
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