The graph of y = 2x is shown, along with the reflection line y = x. what is the equation of its inverse logarithmic function, and what are its domain and range?
y = log2x, domain: x > 0, range: all real numbers
y = logx2, domain: x > 0, range: all real numbers
y = 2−x, domain: all real numbers, range: y > 0
y = log2x, domain: all real numbers, range: y > 0