Function Notation

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•
Mathematics
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is function notation?
Back
Function notation is a way to represent a function using symbols. It typically uses the format f(x), where 'f' is the name of the function and 'x' is the input variable.
2.
FLASHCARD QUESTION
Front
How do you evaluate a function at a specific value?
Back
To evaluate a function at a specific value, substitute the value into the function in place of the variable. For example, to find f(2) for f(x) = 3x + 1, replace x with 2: f(2) = 3(2) + 1 = 7.
3.
FLASHCARD QUESTION
Front
What does f(x) = 6x mean?
Back
This means that the output of the function f for any input x is equal to 6 times that input. For example, if x = 2, then f(2) = 6(2) = 12.
4.
FLASHCARD QUESTION
Front
How do you find the input when given the output?
Back
To find the input when given the output, set the function equal to the output and solve for the variable. For example, if f(x) = 6x and f(x) = -24, set 6x = -24 and solve for x.
5.
FLASHCARD QUESTION
Front
What is the first step to find f(1) if f(x) = 2x + 1?
Back
The first step is to plug 1 in for all the x's in the function. So, f(1) = 2(1) + 1 = 3.
6.
FLASHCARD QUESTION
Front
Evaluate f(-2) if f(x) = x + 3.
Back
To evaluate f(-2), substitute -2 for x: f(-2) = -2 + 3 = 1.
7.
FLASHCARD QUESTION
Front
What is the output of h(x) = -9x + 5 when x = 8?
Back
To find h(8), substitute 8 for x: h(8) = -9(8) + 5 = -72 + 5 = -67.
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