You can put this solution on YOUR website! find the vertex for the equation
y=-3(x-4)2(2 is an exponent)
VERTEX IS THE POINT WHERE THE FUNCTION HAS A MAXIMUM OR MINIMUM OR THE GRAPH HAS A PEAK OR BOTTOM.
HERE (X-4)^2 BEING A SQUARE HAS A MINIMUM OF ZERO...ITS COEFFICIENT IS NEGATIVE SO Y HAS A MINIMUM OF ZERO AT =4...VERTEX IS (4,0)