Function f is an exponential function that is negative on the interval (-∞, 1) and positive on the interval (1, ∞). Which could be the graph of function f?

An exponential function is a function in the form of f (x) = bx or y = bx (if we wish to express the function in terms of y instead of f (x)), where b > 0, b ≠ 1 and x is a ... the interval (-∞, ∞) is because any real number can be put in for x the function f (x) ... zero and negative numbers are not part of the range is because any positive