Question 859561
{{{y = a(x-1)^2 -5}}}  
   -4 = a(-1)^2 - 5, a = 1
{{{y = (x-1)^2 -5}}} 
{{{drawing(300,300,   -6, 6, -6, 6, grid(1), blue(line(1,6,1,-6)) ,
circle(1, -5,0.2),
circle(0, -4,0.2),
graph( 300, 300, -6, 6, -6, 6,0, (x-1)^2-5) )}}}