Final answer:
The output, or y-value, when x = 4 in the function y = x³ - x² - 4x - 16 is 16.
Step-by-step explanation:
To find the output (y-value) when x = 4 in the function y = x³ - x² - 4x - 16, we substitute x = 4 into the equation:
y = (4)³ - (4)² - 4(4) - 16
y = 64 - 16 - 16 - 16
y = 16
So, when x = 4, the output or y-value is 16.