ANSWER
[tex]R:\lbrace1,2,3,7\rbrace[/tex]EXPLANATION
We want to identify the range of the given function.
The range of a function is the set of all y values of the function. In other words, it is the set of all output values of the function.
The given points are in the form:
[tex]f=(x,y)[/tex]Therefore, the range of the function is:
[tex]R:\lbrace1,2,3,7\rbrace[/tex]That is the answer.