Question 309208
Im going to guess that ur list is of points that are all on the same line. in this case use the first 2 points to find the slope.
{{{m=(y-y)/(x-x)}}} (4,11)(16,86)
{{{m=(86-11)/(16-4)}}}
{{{m=(75)/(12)}}}
{{{m=(25)/(4)}}}
no we need to find the y intercept
{{{y=mx+b}}}
{{{11=(25/4)4+b}}}
{{{11=(25)+b}}}
{{{-14=b}}}
rewrite equation
{{{y=(25/4)x-14}}} or {{{4y-25x=-7/2}}}
now to check for the missing points
(9,y)
{{{y=(25/4)9-14}}}
{{{y=56.25-14}}}
{{{y=42.25}}}or {{{169/4}}}
(x,-26.5)
{{{4y+7/2=-25x}}}
{{{4(-26.5)+7/2=-25x}}}
{{{-106+7/2=-25x}}}
{{{-219/2=-25x}}}
{{{-219=-50x}}}
{{{219/50=x}}}
{{{4.38=x}}}