# Evaluating a Function

Taught by TheMathDude
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Part of video series
Meets NCTM Standards:
Lesson Description:

Understand what it means to EVALUATE a function in terms of an output prediction. Be able to actually evaluate a function numerically or symbolically (including composition) given a full functional form. Be able to use your calculator to evaluate a function.

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• How do you evaluate a function at a function?
• What is the composition of functions and how do you input one function into another function?
• If R(t) = 3t + 7 and G(a) = 4a, what is R(G(a))?
• How can you determine when demand will be greatest if you lower and raise the price of a product?
• How can you graph a composition of functions using a TI graphing calculator?
• How can you solve a composition of functions problem to find the time of greatest demand using the table on a TI graphing calculator?
• #### Staff Review

• Currently 5.0/5 Stars.
This lesson explains composition of functions by putting one function into another function. A couple of example cases are shown and explained in depth, and many web resources and a problem set accompany this lesson to help you understand this sometimes confusing concept. All steps involved in this process are explained in detail. A TI graphing calculator is used to solve a composition of functions problem.