Evaluating Functions

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•
Mathematics
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a function?
Back
A function is a relation that assigns exactly one output for each input from a set of inputs.
2.
FLASHCARD QUESTION
Front
How do you evaluate a function at a specific point?
Back
To evaluate a function at a specific point, substitute the value of the variable into the function's equation.
3.
FLASHCARD QUESTION
Front
What does it mean to find f(-9) if f(x) = \frac{1}{2}(x + 5) - 3?
Back
It means to replace x with -9 in the function and simplify to find the output.
4.
FLASHCARD QUESTION
Front
Evaluate f(-9) for f(x) = \frac{1}{2}(x + 5) - 3.
Back
f(-9) = \frac{1}{2}(-9 + 5) - 3 = -5.
5.
FLASHCARD QUESTION
Front
What is the formula for g(x) = -2x^2 + 9?
Back
This is a quadratic function where the output decreases as x moves away from 0.
6.
FLASHCARD QUESTION
Front
Evaluate g(6) for g(x) = -2x^2 + 9.
Back
g(6) = -2(6^2) + 9 = -63.
7.
FLASHCARD QUESTION
Front
What is the first step to find f(1) if f(x) = 2x + 1?
Back
Plug a 1 in for all the x's.
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