Final answer:
The correct equation after translating the function f(x) = vo 3 units in the positive y-direction and reflecting it across the y-axis is f(x) = -vo + 3.
Step-by-step explanation:
The transformations include translating the function 3 units in the positive y-direction and reflecting it across the y-axis. The translation upward by 3 units is represented by adding 3 to the original value of the function, resulting in f(x) = vo + 3. The reflection across the y-axis is represented by changing the sign of x in the function, which would convert f(x) to f(-x). However, since there is no x in the original function f(x) = vo, only the translation affects the function's equation. Therefore, the correct transformation results in the equation f(x) = -vo + 3.