Answer:
Selections are shown in the image
Explanation:
Relations and Functions
A function is a relation between an input and an output set of values with the condition that every element in the domain relates only with one element in the range.
From the options presented below, we'll mark as functions only those who don't have relations between one element in the input set with more than one element in the output set.
In the first relation, every input element is related to only one output element. The same occurs in the second relation.
Note that in the third relation, the input element -5 is related to 4 and also to -4. Element -3 is also related to two different elements. This is not a function.
The fourth relation has the input element 1 related to two different output elements in the pairs (1,0) and (1,2). Thus, this is not a function either.
The fifth relation is a function. No input element is related to more than one output element.
Summarizing the options to select are shown below.