## Calculus 10th Edition

y = $x^{2}$ + 4x Replacing the x with -x changes the equation,so the graph is not symmetrical about the y-axis. Replacing the x with -y changes the equation,so the graph is not symmetrical about the x-axis. Replacing the x,y with -x, -y changes the equation,so the graph is not symmetrical about the origin. The graph confirms our conclusion.