19. (02.04 MC) Damon has $45 to spend at a baseball game. The linear function, f(x), can be used to find the number of concession-stand items he can purchase at the game. The table shown gives values of f(x) at selected values of x. х 0 1 4 5 f(x) 45 42 33 30 Find the equation that models this situation and solve for x. (1 point) Of(x) = -3x + 45; x = 15 items O f() = -3x + 45; x = $15 O f() = 3x + 45; x = 15 items O f(x) = 3x + 45; x = $15