Given :
the relation between garbage, G, produced by a city with population p
[tex]G=f(p)[/tex]G is measured in tons per week, and p is measured in thousands of people.
When : p = 30,000 = 30 thousands , G = 11 tons each week
So, as there is a direct variations between G and p
The relation will take the form :
[tex]G=k\cdot p[/tex]So, the constant k will be :
[tex]k=\frac{G}{p}=\frac{11}{30}[/tex]So, the relation will be :
[tex]G=\frac{11}{30}\cdot p[/tex]So, the equation will be : G = 11/30 * p