Final answer:
The asymptote of the logarithmic function y = log x is the vertical line x = 0.
Step-by-step explanation:
The asymptote of the logarithmic function y = log x is the vertical line x = 0. This means that as x approaches 0 from either the positive or negative direction, the value of y approaches negative infinity. The graph of the logarithmic function will never intersect or touch this line.