Final answer:
Without the exact equation of the function f(x), we cannot determine if an output of 512 is possible. The graph is a horizontal line within the domain 0 ≤ x ≤ 20, but without specific output values, intercepts and special points cannot be identified.
Step-by-step explanation:
If we consider the function f(x) described as a horizontal line, then this graphically represents a function where the output value (y-value) is the same for all input values (x-values) within the defined domain. Since the graph of f(x) is a horizontal line for 0 ≤ x ≤ 20 and no specific output value is given, we cannot say definitively that an output of 512 will occur without additional information about the function's equation. However, the information provided suggests the output is constant for all inputs within the given domain, and unless the constant output is 512, no input value will yield an output of 512. This leads to the answer (d) More information is needed to determine.
Regarding the shape of the graph, since it is a horizontal line, there are no slopes or curves. The intercepts cannot be determined without the exact function, but if we assume the output value is not zero, there would be no y-intercept. The graph would be symmetrical along the line where the function is graphed, but without an exact output value, we cannot specify any special points.