If there is a repeat of a number in the domain (x-axis), the relation is not a function. In this case, there are no repeats in the domain. Therefore, the relation is a function.
A function is a relation between sets that associates to every element of a first set exactly one element of the second set. In the question we see coordinates of points in which the x-coordinate is associated to an y-coordinate. Taking x as the independent variable, then y = f(x). Data can be rewritten in a table format as follows:
x | f(x)
-2 | 2
-1 | 4
1 | 2
3 | -5
This relation is a function because for every element of x there is only 1 element of f(x)
answered: Guest
Answer 20 centimeters15+8=2323-3=20so the answer is 20 centimeters
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