Solving Functions with X
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Objective
I can use function notation to evaluate functions for given values of x.
Part 1 of 4
Warm-up video
Khan Academy · 11:49Vetted channel
We don't generate video — this one is by Khan Academy on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
A function is an association between two variables, where for every input x, there is a corresponding output f(x).
- 2
To evaluate a function f(x) at a specific value, such as f(7), you substitute 7 for x in the function's definition.
- 3
A valid function must produce only one f(x) value for each x value; otherwise, it is not a function.
Part 3 of 4
Practice
7 questions
In function notation, what does f(x) typically represent?
If g(x) = x² + 1, find g(3).
Part 4 of 4
Exit ticket
Quick comprehension check
“Given the function f(x) = 3x - 5, what is the value of f(4)? Show your work.”
Sample answer included in the free materials
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