Using the graph of f left parenthesis x right parenthesis equals 1 fourth x squared, estimate the derivative of f left parenthesis x right parenthesis when x equals short dash 4. A graph with an x-axis and a y-axis ranging from -6 to 6. The graph has a curve and a dashed line. The curve starts from the second quadrant, passes through a marked point at (-4, 4), dips downward to the origin, and then rises in the first quadrant. The dashed line slants downward from the second quadrant, passes through a marked point at (-4, 4), and then extends into the fourth quadrant by crossing the point -2 on the x-axis and -4 on the y-axis. The line is tangent to the curve at (-4, 4)