What is a function?
Functions- find f(x) and x from a graph

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•
Mathematics
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A function is a relation that assigns exactly one output (y) for each input (x).
2.
FLASHCARD QUESTION
Front
What does f(x) represent in a function?
Back
f(x) represents the output value of the function for a given input x.
3.
FLASHCARD QUESTION
Front
If f(x) = -2, how do you find x from a graph?
Back
You look for the point on the graph where the output (y) is -2 and read the corresponding x value.
4.
FLASHCARD QUESTION
Front
What is the vertical line test?
Back
The vertical line test is a method to determine if a graph represents a function; if a vertical line intersects the graph at more than one point, it is not a function.
5.
FLASHCARD QUESTION
Front
What does it mean if a function has repeating input values?
Back
If a function has repeating input values, it means that it is not a function, as each input must correspond to exactly one output.
6.
FLASHCARD QUESTION
Front
How do you find f(1) from a graph?
Back
To find f(1), locate x = 1 on the graph and read the corresponding y value.
7.
FLASHCARD QUESTION
Front
What is the output of g(x) = 4x - 7 when x = -9?
Back
g(-9) = 4(-9) - 7 = -36 - 7 = -43.
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