Evaluating Functions
Flashcard
•
Mathematics
•
8th - 9th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the definition of a function in mathematics?
Back
A function is a relation that assigns exactly one output for each input from a given set, known as the domain.
2.
FLASHCARD QUESTION
Front
What does it mean to evaluate a function at a specific point?
Back
Evaluating a function at a specific point means substituting the input value into the function's formula to find the corresponding output value.
3.
FLASHCARD QUESTION
Front
How do you evaluate the function f(x) = x^2 - 5x at x = -4?
Back
Substitute -4 into the function: f(-4) = (-4)^2 - 5(-4) = 16 + 20 = 36.
4.
FLASHCARD QUESTION
Front
What is the output of the function f(x) = 4x + 5 when x = 4?
Back
Substituting 4 into the function gives f(4) = 4(4) + 5 = 16 + 5 = 21.
5.
FLASHCARD QUESTION
Front
How do you find f(-5) for the function f(x) = 3x^2 - 11?
Back
Substitute -5 into the function: f(-5) = 3(-5)^2 - 11 = 3(25) - 11 = 75 - 11 = 64.
6.
FLASHCARD QUESTION
Front
What is the value of f(-5) for the function f(x) = x + 3?
Back
Substituting -5 into the function gives f(-5) = -5 + 3 = -2.
7.
FLASHCARD QUESTION
Front
How do you evaluate the function f(x) = 2x + 2 for x = 4?
Back
Substituting 4 into the function gives f(4) = 2(4) + 2 = 8 + 2 = 10.
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