You can put this solution on YOUR website! THE ANSWER IS YES. THIS IS A LINEAR EQUATION (EQUATION OF A LINE)
Y-4X=9, Y=4X+9 IS A QUADRATIC EQUATION FOR A LINE. WHEN GRAPHED LOOKS LIKE THIS: (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = 4x +9).