Graph the function.
xy + 16 = 0
This equation can be rearranged into slope-intercept form as y = -16/x. This function will have a vertical asymptote at x = 0. As x approaches positive or negative infinity, y approaches 0.
The graph of the function will look like two hyperbolas with asymptotes parallel to the x and y axes.
Since I cannot draw the graph here, I recommend using a graphing calculator or software to accurately graph the function.