Answer:
The value of f(x) at x=6 is

Therefore, the correct option is D) 218
Explanation:
We need to solve the value of f(x) at x=6
Given step function is
for the range of -6 < x < 9
( 6 is in this range)
Substitute the value x=6 in
:





Hence, the value of f(x) at x=6 is

Therefore, the correct option is D) 218