Question 1113887

if {{{r}}} varies {{{directly}}} as {{{s}}} and inversely as {{{t}}}, we have

{{{r=k*s/t}}}


If {{{s = -2}}} and {{{t = 4}}}, then {{{r = 6}}}, we have:

{{{r=k*s/t}}}

{{{6=k*(-2)/4}}}

{{{6=k*(-1/2)}}}

{{{k=6/(-1/2)}}}

{{{k=12/(-1)}}}

{{{k=-12}}}