What is a function?
Evaluating Functions

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•
Mathematics
•
8th 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 find the output value when a specific input value is substituted into the function.
3.
FLASHCARD QUESTION
Front
If f(x) = 2x + 3, what is f(1)?
Back
f(1) = 2(1) + 3 = 5.
4.
FLASHCARD QUESTION
Front
What is the value of f(-5) if f(x) = -2x + 8?
Back
f(-5) = -2(-5) + 8 = 10 + 8 = 18.
5.
FLASHCARD QUESTION
Front
How do you find g(-5) if g(x) = 5 - 6x?
Back
g(-5) = 5 - 6(-5) = 5 + 30 = 35.
6.
FLASHCARD QUESTION
Front
What is the output of f(x) = x^2 when x = 4?
Back
f(4) = 4^2 = 16.
7.
FLASHCARD QUESTION
Front
What is the definition of a linear function?
Back
A linear function is a function that can be graphically represented in the Cartesian plane as a straight line.
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