How to tell if an equation is a function or not

1 answer:

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You can tell an equation is a function because every element in the domain has only 1 element in the range

For instance, lets take this set. (2,3)(4,5)(6,7)
The domain is 2,4,6 and our range is 3,5,7 for ever range there is only one unique range that goes with it.

Now, lets take this set. (2,4)(2,4)(3,5)
Here our domain is 2,2,5 and our range is 4,4,5
Here we can see that both 2 points to 4 so this is not a function.

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Customers' sandwich choices one day at ray's lunch counter are shown.

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If you read the question you can find that some requirements were missing. By Googling the Question the complete content could be found here:

https://www.chegg.com/homework-help/questions-and-answers/ved-restore-nu-sge-essments-testnavaspx-idassessment-1591215-idwebuser-30156018idsection-1-q44055003

The relative frequencies missing in the table are :

ham-wheat = 0.231, cheese-wheat = 0.0.462.

rye-turkey = 0.167, rye-ham = 0.417.

Step-by-step explanation:

From the given data we have to count the frequencies of wheat and rye chosen to find the missing values.

The frequency of wheat chosen = 13.

The frequency of rye chosen = 12.

Relative Frequency can be obtained by dividing the combined frequency by the total number of data values.

Wheat combinations:

1) The frequency of ham-wheat = 3.

Then the relative frequency of ham-wheat = $\frac{3}{13}$ .