Questions and Answers
If f(x) = x + 2, then what is f(-2)?
-2
If f(x) = -3x + 2, then what is f(7)?
-19
If f(x) = \frac{1}{2}x - 10, then what is f(30)?
5
If f(x) = x + 2, then what is f(-9)?
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If f(x) = 2x, then what is f(1)?
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If f(x) = 2x, then what is f(-4)?
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If f(x) = 4x + |x|, then what is f(-2)?
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If f(x) = 5x + 1, then what is f(2)?
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Find f(4).
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Find f(2).
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Find f(-1).
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Find f(0).
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Study Notes
Function Notation Basics
- Function notation expresses a relationship between an input (x) and output (f(x)).
- To evaluate a function, substitute the input value for x in the function’s expression.
Evaluating Functions
- For the function f(x) = x + 2, substituting -2 gives f(-2) = 0.
- For f(x) = -3x + 2, substituting 7 results in f(7) = -19.
- For f(x) = 1/2x - 10, substituting 30 yields f(30) = 5.
- For f(x) = x + 2 with an input of -9 results in f(-9) = -7.
More Function Evaluations
- For the function f(x) = 2x, substituting 1 gives f(1) = 2.
- The same function with an input of -4 results in f(-4) = -8.
- For f(x) = 4x + |x|, substituting -2 gives f(-2) = -6.
- For f(x) = 5x + 1, substituting 2 gives f(2) = 11.
Additional Function Values
- Evaluating f(4) from a certain function yields -1.
- Finding f(2) gives a result of 3.
- For an input of -1, evaluating yields f(-1) = -2.
- The value of f(0) results in -3, demonstrating the function's behavior at zero.
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Test your understanding of function notation with these Algebra 1 flashcards. Each card presents a function and asks you to solve for specific values. Perfect for reinforcing your skills in evaluating functions.
