The graph of the function f(x) is shown below. On a coordinate plane, a curved line with a minimum value of (0.6, 2.5) and a maximum value of (negative 1.2, 18.3), crosses the x-axis at (negative 1.8, 0) and crosses the y-axis at (0, 5). What is x when f(x)=0? -1.8 -1.2 0 5