Ineed to know if the graph is even, odd or neither.

Neither.

for a function to be even, this must be true:

f(x) = f(-x)

this basically says the graph of the function, when reflected in the y-axis, should have no effect. this is y-axis symmetry. we do not have that here; it is not even.

for a function to be odd, this must be true:

f(-x) = -f(x)

this says that the graph of the function is symmetrical about the origin. or if you reflect the original function the x-axis, it should get the exact same result if you had reflected the original function in the y-axis. that does not hold true here either.

it's neither

The correct answer is $90