QTR 2: ALG U7 CW #5: Evaluating Functions & Interval Notation

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Mathematics
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the definition of a function?
Back
A function is a relation that assigns exactly one output for each input from its domain.
2.
FLASHCARD QUESTION
Front
What does f(x) represent in a function?
Back
f(x) represents the output of the function f for a given input x.
3.
FLASHCARD QUESTION
Front
How do you evaluate a function at a specific point, such as f(4) for f(x) = 4x + 5?
Back
To evaluate f(4), substitute 4 for x in the function: f(4) = 4(4) + 5 = 21.
4.
FLASHCARD QUESTION
Front
What is interval notation?
Back
Interval notation is a way of writing subsets of the real number line using intervals.
5.
FLASHCARD QUESTION
Front
How do you express the interval [3, 5] as an inequality?
Back
3 ≤ x ≤ 5.
6.
FLASHCARD QUESTION
Front
What is the first step to evaluate f(1) for f(x) = 2x + 1?
Back
Plug a 1 in for all the x's.
7.
FLASHCARD QUESTION
Front
Evaluate f(-1) for f(x) = 2x² + 5x - 3.
Back
f(-1) = 2(-1)² + 5(-1) - 3 = -6.
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