Concept explainers
Advanced-Stage Breast Cancer The data in the table below represent the percentage of patients who have survived after diagnosis of advanced-stage breast cancer at 6-month intervals of time.
(a) Using a graphing utility, draw a
(b) Using a graphing utility, build an exponential model from the data.
(c) Express the function found in part (b) in the form .
(d) Graph the exponential function found in part (b) or (c) on the scatter diagram.
(e) What percentage of patients diagnosed with advanced-stage cancer are expected to survive for 4 years after initial diagnosis?
(f) Interpret the meaning of in the function found in part (c).
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Precalculus Enhanced with Graphing Utilities (7th Edition)
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