Question 762553
graph {{{f(x)=x^2-3}}} 

then draw the line {{{x=3}}} and label the point {{{P}}}=({{{3}}},{{{f(3)}}})

find {{{f(3)}}}

{{{f(3)=3^2-3}}} 

{{{f(3)=9-3}}}

{{{f(3)=6}}}


{{{drawing(600,600, -10, 10, -10, 10,locate(3,6,P(3,6)),  blue(line(3,10,3,-10)), grid(0),
graph(600, 600, -10, 10, -10, 10,x^2-3)) }}}