Question

x
0 3 4 5 4 3 0
y
5 4 3 0 -3 -4 -5
Question:

State the defining property of a function, and explain whether or not the table represents a function of x.

Answer 1

in simple terms, a function always takes an x to a unique y. the table is not a function, since
f(0)=-5 and f(0) = 5.