In which direction does the parabola that is given by the equation below open x -2.5(y - Y plus 5?

The equation you provided seems to be incomplete and a bit unclear. However, if we interpret it as ( x = -2.5(y + 5) ) (assuming you meant ( y + 5 )), the parabola opens to the left since the coefficient of ( y ) is negative. If the equation is different, please provide the correct form for a more accurate determination.