Question 1146996
{{{y=a(x-3)^2+8}}}

{{{(y-8)/(x-3)^2=a}}}

substitute for (0,2):

{{{a=(2-8)/(0-3)^2}}}

{{{a=-6/9}}}

{{{a=-2/3}}}


{{{highlight(y=-(2/3)(x-3)^2+8)}}}