Standard+2.7d-cew

===Standard 2.7.d: Model a situation that can be described by a rational function and use the model to answer questions about the situation.=== A rational function is basically using word problems to solve rational functions, and if you know how to work word problems then rational functions should be easy for you.

Example Problems for Standard 2.7d
Below are two example problems. They range from easy to difficult. if the surface area of a closed cylinder is 25 square inches, which equation represent the height of the cylinder in term of R?
 * Problem 1-Easy**

To answer this question, you must understand what the equation is stating. It is saying a number is multiplied to 4. This answer is then subtracted by 10 and the result is 18. In order to find the number, we must complete inverse operations. This means completing the opposite operation and working in reverse. See the steps below.


 * Problem 2 - Difficult**

a homeowner stocked his pond with fish. the number of fish,F increases according to the above equation, where F is the time in years. what is the approximate number of fish after 10 years?

This question is only difficult because it is asking you to create an equation. It also is a word problem which is often harder for most students. In order to answer this question, think about what operations you have to use to get how much Stacy earns. This helps to create the equation. Well, Stacy makes 15 a week to start. But she also gets .50 for each customer. Well, to find out how much she gets if she had 10 customers, we would multiply .50 by 10 customers. We still would have to add 15 to get her amount. Let's see, we multiplied and added. Let's write an equation in words then replace the words with letters and numbers.

Podcast for Standard 2.7d
Below is a tutorial on understanding modeling rational functions.