You can put this solution on YOUR website! First, find two pairs of points that satisfy the given equation.
point 1 -- When x = 0, y = -3*0=0. So (0,0) is one point on the graph of the equation.
point 2 -- When x = 1, y = -3*1=-1, So (1,-3) is another point on the graph of the equation.
You can plot more points but two points determine the graph of a line.