Which of the following represents a function?
1 Answer
Jun 26, 2018
See explanation below
Explanation:
A function is an aplication from a set A to other B such that, very element from A has a unique "associated" element by function.
In first case: There is an element (3), with 2 arrows, so this element has no unique element in y. Is not a function
Second case: there are 2 pairs (-1,-11) and (-1,-5) saying that element -1 has 2 associates by function. Is not a funtion
Third case: again, 3 has two elements associated by function (14 and 19). Is not a function
Last case: Is a function because every element in x-axis has an only element associated by aplication. The functional relationship is a quadratic relationship. (Parabola)
Hope this helps