Evaluating a Function In Exercises 5–12,evaluate the function at the given value(s) of theindependent variable. Simplify the results.f (x) = 3x − 2 (c) f (b)

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Part A: f(a+h) Part B: f(a) Part C: f(a+h)-f(a) Part D: f(a+h)-f(a) all divided by h

U.S. Population The U.S. population can be modeledfor the years 1960–2060 by the function p = 2.6x +177, where p is in millions of people and x is in yearsfrom 1960. During what year does the model estimatethe population to be 320,000,000?(Source: www.census.gov/statab)