Which description compares the domains of function a and function b correctly?
function a f(x) = log x
function b
a - the domain of function a is the set of real numbers greater than or equal to 1
the domain of function b is the set of real numbers greater than 1
b- the domain of function a is the set of real numbers is greater than 0
the domain of the function b is the set of real numbers greater than or equal to 1
c- the domain of both functions is the set of real numbers
d- the domain of both functions is the set of real numbers greater than or equal to 1

Choice B is correct; the domain of function A is the set of real numbers greater than 0  

The domain of the function B is the set of real numbers greater than or equal to 1

Step-by-step explanation:

The domain of a function refers to the set of x-values for which the function is real and defined. The graph of function B reveals that the function is defined when x is equal 1 and beyond; that is its domain is the set of real numbers greater than or equal to 1.

On the other hand, the natural logarithm function is defined everywhere on the real line except when x =0; this will imply that its domain  is the set of real numbers greater than 0 . In fact, the y-axis or the line x =0 is a vertical asymptote of the natural log function; meaning that its graph approaches this line indefinitely but neither touches nor crosses it.

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