(a) Use a graphing utility to graph f (x) = ln x and f (x - c) = ln (x - c) for c = - 4, - 2, 1, and 5 on the same axes.
(b) For each c-value, identify the vertical asymptote and the domain of y = ln (x = c).
(c) For each c-value, find the x-intercept of y = ln (x - c).
(d) Write a sentence that explains precisely how the graphs of y = f (x) and y = f (x - c) are related.