Determine the domain of the following graph:

Answer:
f(x) = x(x^2 - 36)
Step-by-step explanation:
Identify the x-intercepts of the graph, they are:
(-6,0) (0,0) (6,0)
Therefore you would need to search for an equation that looks like
f(x) = x(x + 6)(x - 6)
However that is not an option, but
(x^2 - 36) = (x+6) (x-6)