To explain: the procedure to find whether the relation is a function or not.
Explanation of Solution
Given information:
Consider the function.
Relation is a function, if each input having only one output.
Consider the relation
The above relation is function. Since, at single input we have only one output.
Or we can use vertical line test.
Vertical line test:
Draw a vertical line anywhere on to graph. If the line intersects at only one point on the
graph, then the relation is a function. Otherwise, not.
The above figure explains the vertical line test.
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Algebra 1, Homework Practice Workbook (MERRILL ALGEBRA 1)
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