What is a function?
Evaluating Functions

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•
Mathematics
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.
2.
FLASHCARD QUESTION
Front
What does it mean to evaluate a function?
Back
To evaluate a function means to calculate the output of the function for a specific input value.
3.
FLASHCARD QUESTION
Front
What is the notation for a function?
Back
Functions are typically denoted by letters such as f, g, or h, followed by parentheses containing the input value, e.g., f(x).
4.
FLASHCARD QUESTION
Front
How do you evaluate f(x) = 2x^2 + 5x - 17 for f(-1)?
Back
f(-1) = 2(-1)^2 + 5(-1) - 17 = 2 - 5 - 17 = -20.
5.
FLASHCARD QUESTION
Front
What is the value of f(-1) if f(x) = 6x^2 - 4?
Back
f(-1) = 6(-1)^2 - 4 = 6 - 4 = 2.
6.
FLASHCARD QUESTION
Front
Evaluate the function f(x) = 3x + 2 for f(2).
Back
f(2) = 3(2) + 2 = 6 + 2 = 8.
7.
FLASHCARD QUESTION
Front
If h(a) = 3 - 2a^2, what is h(-3)?
Back
h(-3) = 3 - 2(-3)^2 = 3 - 2(9) = 3 - 18 = -15.
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