The graph shows the profit P (in thousands of dollars) of a company in terms of its advertising cost x (in thousands of dollars).

(a) Estimate the interval on which the profit is increasing.
(b) Estimate the interval on which the profit is decreasing.
(c) Estimate the amount of money the company should spend on advertising in order to yield a maximum profit.
(d) The point of diminishing returns is the point at which the rate of growth of the profit function begins to decline. Estimate the point of diminishing returns.

Transcribed Image Text:

Profit (in thousands of dollars) P 4000- 3500 3000 2500 2000 1500 1000 500- Profit of a Company MONO ….... ....... .......…...……..…....….............….. .…...….….....…... + 70 + + + + 10 20 30 40 50 60 Advertising cost (in thousands of dollars)