Think of the x and y as questions and answers. If you repeat a question you should get the same answer. If you don't then it is not a function.
(2,3),(2,4) is not a function.
(2,3),(2,3) is a function.
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If a relation can be called a function, it means that the relation maps every element to one and only one other element. If you have some ordered pairs and see that, for example, 1 maps to 4 (1,4) and 1 also maps to 7 (1,7) , you don't have a function.
If it's a linear function, 3 should do, but 4 will give an extra check on you work. If the function is quadratic exponential, etc. then at least 4 pairs should be used.
Which 2 order pairs are solutions of y x + 5
A relation is defined as a set of ordered pairs. A function is a special kind of relation ...
Ordered pairs are represented as functions themselves or they compose a function. They are written as (x, y) as coordinates for their respective function. For example, for the function y=2x, it contains the ordered pairs (0, 0), (1, 2), and so on by plugging in the coordinates for x and y. Where x=0, y=0 because y=2(0). Where x=1, y=2 because y=2(1). To graph ordered pairs, you must be given their respective function(s). From there, it is possible to make a chart of the x and y coordinates in that function, and plot them accordingly.