Give the equation of the function whose graph is described. The graph of y=x is shifted 3 units to the left. This graph is then vertically stretched by a factor of 5 and r across the x-axis. Finally, the graph is shifted 7 units downward OA. y=-5(x-3)2-7 OB. y=-5(x+3)2-7 Oc. y=-5(x-3)2+7) OD. y=-5(x+7)2-3