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Find the relation which is a function.
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Answer to Problem 38STP
D is the correct option.
Explanation of Solution
Given:
The relation options are:
Concept Used:
To be a function, then for each member in the domain, there is only one member of range. We can also graph the points and use the vertical line test to confirm.
In Choice A: The points (4, 3) and (4, 2) have the same x − values but different y − values. Thus the relation in Choice A is not a function.
In Choice B, all four points have 3 as x − values but different y − values. Thus the relation in Choice B is not a function.
In Choice C, (− 2, 3) and (− 2, 1) have the same x − values but different y − values. Thus the relation in Choice C is not a function.
The relation In Choice D is a function because none of the x values are repeated. So, the correct choice is D.
Thus, the correct choice is D.
Chapter 3 Solutions
Algebra 1
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