I have an answer for the last image.. The first step to finding the y-coordinate of the vertex of the equation y= -2x^2+2x-3 given that the x-coordinate of the vertex is 1/2 is the last option: -2(1/2)^2+2(1/2)-3.. The variable x represents the x-coordinate which means that all you have to do to start is plug in the vertex they gave you: 1/2