The set {(10,5), (-10,-5), (5,10), (-5,-10)} represents a function , Option D is the correct answer.
The correct option 4 is
{(10,5), (-10,-5), (5,10), (-5,-10)}
<h3>What is a Function ?</h3>
A function is a law that states relation between a dependent variable and an independent variable .
For a data to satisfy being a function ,
For every individual value of x , there should be one value of y
If there are two values for a single x then the data set doesn't represent a function but it shows a relation.
For Option 1,2 and 3 , for the same value of x there are two values of y and in only the last set the value is different.
Therefore the set {(10,5), (-10,-5), (5,10), (-5,-10)} represents a function
Option D is the correct answer.
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