Question 1086280

if you have {{{1}}},{{{2}}},{{{3}}},{{{4}}}, on x and y-axis, than

a) the x-value(s) for which {{{f(x)=3}}} is {{{x=2}}}
it's point({{{2}}},{{{3}}})

b) {{{f(-4)}}} means find {{{f(x)}}} when {{{x=-4}}}: it is {{{f(-4)=0}}}

it's point({{{-4}}},{{{0}}})