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6th Edition

Stewart + 5 others

Publisher: Cengage Learning

ISBN: 9780840068071

Chapter 1.7, Problem 111E

(a)

To determine

The formula for the number of seats sold in the flights.

Expert Solution

The formula for number of seat is *.*

**Given:**

The number of seats sold at ticket price of

**Calculation:**

In the linear model *P* dollars.

Since the number of seats sold at ticket price of

When the price of seat is increased by

Equating

Substitute *b* as follows:

Substitute

So, the formula for the number of seats is

(b)

To determine

The range of ticket prices for the given number of seats.

Expert Solution

The range for the ticket prices is from

**Given:**

The number of seat sold for this flight range is 90 to 115.

**Calculation:**

From part (a), The formula for ticket price is

Substitute the value 90 for

Substitute the value 115 for

Therefore, the range for the ticket prices is from