# Suppose that the total revenue realized by the Odyssey Travel Agency is R=f(x) thousand dollars if x thousand dollars are spent on advertising. What does f(b)-f(a)/b-a         (0<a<b) measure? What are the units? What does f'(x) measure? Give units. Given that f'(20)=3 what is the approximate change in the revenue if Odyssey increases its advertising budget from $20,000 to$21,000?

Question

Suppose that the total revenue realized by the Odyssey Travel Agency is R=f(x) thousand dollars if x thousand dollars are spent on advertising.

1. What does

f(b)-f(a)/b-a         (0<a<b)

measure? What are the units?

2. What does f'(x) measure? Give units.

3. Given that f'(20)=3 what is the approximate change in the revenue if Odyssey increases its advertising budget from $20,000 to$21,000?

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MathCalculus