11-10 -9 -8 -7 -6 -5 -4 -3 -2 2 1 4 5 6 7 8 -2 -3+ b The curve above is the graph of a sinusoidal function. It goes through the points (-9, -2) and (1, 2). Find a sinusoidal function that matches the given graph. If needed, you can enter =3.1416... as 'pi' in your answer, otherwise use at least 3 decimal digits. f(x) =