Question 79343
r = revenue
a = advertising budget
k = constant of proportionality
{{{r = k*a}}}
{{{r = 120000}}}
{{{a = 2000}}}
{{{120000 = k*2000}}}
{{{k = 60}}}
{{{r = 60a}}}
{{{180000 = 60a}}}
{{{a = 3000}}}
$3,000 is being spent on advertising when the 
revenue is $180,000