Relations and Functions 4
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Lesson Summary:
In this lesson, we continue to learn about relations and functions, specifically focusing on using function notation and finding inputs and outputs. We practice with different functions and their rules, and also discuss the importance of domain and range. The lesson culminates in more advanced problems involving multiple functions and variables, preparing us for future precalculus and calculus concepts.
Lesson Description:
More help and practice with relations and functions.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- What is function notation?
- If f(x) = 2x - 3, what is f(0), f(-5), and f(m)?
- If g(x) = x^2 + 1, what is g(6) and g(-3)?
- If h(x) = (x + 1)/(x - 2), how do you find h(0), h(5), and h(2)?
- How do you know which values are not in the domain of a function?
- What is the domain of a function?
- If f(x) = 2x - 3, what is f(x - 3), f(4x), f(x+h), and f(x + h) - f(x)?
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Staff Review
This lesson explains function notation, what it means, and how to find the outputs of functions given inputs using function notation. The concept of function notation is explained and many example problems are shown, and the problems get more difficult as the lesson proceeds. The concept of domain and which values are in the domain of a function is explained as well.
