This graph represents f(x), and g(x) = -7x + 8. which statement about these functions is true? a. function f(x) is increasing, and g(x) is decreasing. b. function f(x) is decreasing, and g(x) is increasing. c. functions f(x) and g(x) are both decreasing. d. functions f(x) and g(x) are both increasing.