How do you find c when given the vertex of a parabola?

Parabolas have two equation forms – standard and vertex. In the vertex form, y = a(x - h)2 + k, the variables h and k are the coordinates of the parabola's vertex. In the standard form, y = ax2 + bx + c, a parabolic equation resembles a classic quadratic equation.

I tried my best hope this helps!

y = i/2 xtnop + (3i/2 tnop+ 1)

step-by-step explanation:

the picture is the step by step explanation.