A company fits a model to the monthly sales data for a seasonal product. The model is
Chapter 4, Problem 64(choose chapter or problem)
Average Sales A company fits a model to the monthly sales data for a seasonal product. The model is
\(S(t)=\frac{t}{4}+1.8+0.5 \sin \left(\frac{\pi t}{6}\right)\), \(0 \leq t \leq 24\)
where S is sales (in thousands) and t is time in months.
(a) Use a graphing utility to graph \(f(t)=0.5 \sin (\pi t / 6)\) for 0<t<24. Use the graph to explain why the average value of f(t) is 0 over the interval.
(b) Use a graphing utility to graph S(t) and the line g(t) = t/4 +1.8 in the same viewing window. Use the graph and the result of part (a) to explain why g is called the trend line.
Text Transcription:
f(t)=0.5 \sin (\pi t / 6)
S(t)=\frac{t}{4}+1.8+0.5 \sin \left(\frac{\pi t}{6}\right)
0 \leq t \leq 24
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