Find the domain of the logarithmic function f(x) = log4^ x.
A. Any real numbers
B. Positive real numbers
C. Negative real numbers
D. Non-zero real numbers

What affect does the "a" value have on the function f(x) = log(x)?
A. The "a" value reflects the graph across the y-axis.
B. The "a" value moves the function up or down.
C. The "a" value moves the function to the left or right.
D. The "a" value stretches the function vertically by a factor of |a|