suppose the only information you know about a function f is that the domain of f?

Question

is the set of real numbers and that f
f(1)=1,f(2)=4,f(3)=9,f(4)=16what can you say about the value of ,f(5).
Hint the answer to this problem is not 25 the shortest correct answer is just one word

Answer 1

nothing.

Knowing 4 points does not say anything about where a 5th point might be.