13. Is 18
15. Is 86
17 is 5
19 is 15
21 is 24
23 is 29
The answer is -4. The range is the y-value and when you say f(x) that is the same thing as y, so if f(x) = -4 that means y = -4 which means the range is -4.
Three values that would make this true:
5
4
3
The negitives are far from the 0 so its less than the non negitives