Question 934517

Find the constant of variation k for the inverse variation. 

{{{y=k/x}}}...the inverse variation

if {{{y = 2.5=5/2}}} when {{{x = 9}}}, then we have

you can use {{{y = 2.5}}} or {{{y =5/2}}}

{{{5/2=k/9}}}

{{{5/2*9=k}}}

{{{45/2=k}}}

so, equation is: 

{{{y=(45/2)/x}}}

{{{y=45/2x}}} or in case you use use {{{ 2.5}}} you will have {{{y=22.5/x}}}