How do you figure out if a relation is a function? You could set up the relation as a table of ordered pairs. Then, test to see if each element in the domain is matched with exactly one element in the range. If so, you have a function!
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Table of Contents
What makes a relation a function?
A function is a relation in which each input has only one output. In the relation , y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y.
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What is an example of a relation but not a function?
A circle is a relation, but not a function. If we draw a vertical line through the center of the circle, it will intersect the graph at the top and bottom (thus failing the vertical line test).
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What is an example of a relation that is not a function?
The equations y = ± x and x 2 + y 2 = 9 are examples of non-functions because there is at least one -value with two or more -values.
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What is a relation but not a function?
| A relation which is not a function | A relation that is a function |
|---|---|
| As we can see duplication in X-values with different y-values, then this relation is not a function. | As every value of X is different and is associated with only one value of y, this relation is a function |
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What is a real life example of relation but not a function?
The Set of parents with their children is a real life example which is relation but not a function.
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What makes a relation into a function?
A function is a relation which describes that there should be only one output for each input (or) we can say that a special kind of relation (a set of ordered pairs), which follows a rule i.e., every X-value should be associated with only one y-value is called a function.
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What is a relation that is not a function?
Relations That Are Not Functions. A function is a relation between domain and range such that each value in the domain corresponds to only one value in the range. Relations that are not functions violate this definition. They feature at least one value in the domain that corresponds to two or more values in the range.
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What makes a relation on a graph a function?
You can tell whether a relation is a function by plotting the numbers on a graph and applying the vertical line test. If no vertical line passing through the graph intersects it at more than one point, the relation is a function.
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Is relation always a function?
Functions- The relation that defines the set of inputs to the set of outputs is called the functions. In function, each input in set X has exactly one output in set Y. Note: All functions are relations but all relations are not functions.
