Answer:
option b.
The graph of f(x) has exactly one x-intercept.
Explanation:
Given that the function f(x) is a linear function defined for all real values of x.
Thus graph of f(x) would be a straight line cutting x axis exactly at one point.
Hence f(x) cannot have two intercepts or infinitely many intercepts.
zero intercept is possible only if the function is constant as y=a
Thus out of the four options given the correct option is
option b.
The graph of f(x) has exactly one x-intercept.