There isn't one solution, but many solutions, and they are represented by a line graph. To draw it, you need to find points on the x and y axes you can draw a line through. We do this by making x=0 in the equation and finding the y intercept, and then putting in y=0 to find the x intercept. When x=0, 3y=-9 so y=-3. Mark -3 on the y axis. When y=0, x=-9 so mark -9 on the axis. Draw a line through these two points and you get the graph. The graph shows all values of y for all values of x, and vice versa.