Question

Which of the following equations is of a parabola with a vertex at (1, -2)?

Answer 1

$The\ vertex\ form:y=a(x-h)^2+k\\\\(h;\ k)-the\ coordinates\ of\ vertex\\\\vertex:(1;-2)\\\\y=a(x-1)^2-2\ where\ "a"\ is\ some\ number\ not\ equal\ zero.$