A commercial vegetable and fruit grower carefully observes the relationship between the amount of fertilizer used on
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Question:
A commercial vegetable and fruit grower carefully observes the relationship between the amount of fertilizer used on a certain variety of pumpkin and the revenue made from sales of the resulting pumpkin crop, recorded in the following table
Amount of Fertilizer (pounds/acre) | 250 | 500 | 750 | 1000 | 1250 | 1500 | 1750 | 2000 |
Revenue earned (dollars/acre) | 96 | 145 | 172 | 185 | 192 | 196 | 198 | 199 |
The fertilizer costs $0.14 per pound. What would you advise the grower is the most profitable amount of fertilizer to use? Check your advice by answering/calculating the following.
- Is each pound of fertilizer equally effective? Explain.
- Graph the data and then estimate the maximum amount of revenue that can be earned per acre from your graph. Call this estimate k.
- Compute a linear regression for the data.
- Compute a logarithmic regression(LnReg) for the data.
- Use trial and error on your calculator to fit a function of the form r=k(1−bx)r=k(1-bx) where k is the estimate for the maximum amount of revenue and 0
- Choose the best model for revenue and then write a total cost function for fertilizer. Use graphs on your calculator to find where cost equals revenue.
- Write a profit function and graph it to advise the grower on the most profitable amount of fertilizer to use.
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