- View Policies Current Attempt in Progress Graph the function. Then use the derivative and algebra to find the location of the critical points and where the function is monotonic (that is, increasing or decreasing) and explain the shape of the graph. f( x) = 685 - 90x3 Enter the critical points in increasing order. There are critical points at x = and x = i The graph of f(x) is increasing for and decreasing for eTextbook and Media