Risk factors and causes. The retina is the layer of tissue that lines the inside of the eye. It is light sensitive and its function is to send visual signals to the brain, through the optic nerve. Eye trauma can cause a detached retina. Retinal detachment happens when this layer is pulled from its normal position.
Completing the Square: Finding the Vertex (page 1 of 2) The vertex form of a quadratic is given by. y = a(x â h)2 + k, where (h, k) is the vertex. The a in the vertex form is the same a as. in y = ax2 + bx + c (that is, both a's have exactly the same value). The sign on a tells you whether the quadratic opens up or opens down.
A vertex is the point, indicated by a black dot, where a curve ends or the point where two line segments meet in a freeform, curve, or scribble shape. To make it easier to draw details, increase the magnification to 200 percent. On the View tab, in the Zoom group, click Zoom, and then click 200% .