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20 votes
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Find out if these expressions are functions or not then compare

Find out if these expressions are functions or not then compare-example-1
User AlphaBeta
by
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1 Answer

14 votes
14 votes

Answer to Question 9

Doman ={ 0, 5, 1, -8 }

Range = {3, 5 -4, 4, 2 }

It is not a function.

Step - by - Step Explanation

What to find?

• Domain

,

• Range

Given:

{ (0, 3), (5, 5), (1, -4), (-8, 4), (5, 2) }

The domain of a function (x, y) is the x - value and its range is the y - value.

If a set has one x - value mapped to more than one different y- value, then it is a relation otherwise it is a function.

From the given set, the domain are { 0, 5, 1, -8 }

The range are {3, 5 -4, 4, 2 }

Observe that in the given set, one x - value are mapped to two different y- values i. e The range are {5, 5} and { 5, 2}.

Therefore, it is not a function.

User GniruT
by
2.7k points