If the function f(x) = mx + b has an inverse function, which statement must be true?

m=/0

m = 0

b=/0

b = 0

The inverse function of the function f(x) = mx + b can be determined by expressing the function in terms of x alone. hence, (y - b)/m = x. Then we exhange x and y, to result to (x - b)/m = y. In this case, m is not equal to zero. The answer to this problem hence is A>