The number n of aluminum cans used each year is directly proportional to the number of people using the cans. if 250 people use 60,000 cans in one year, how many cans are used each year in dallas, which has a population of 1,008,000.

The answer is:  " 241,920,000 cans " .
________________________________________________________

Explanation:
_______________________________________________________

(60,000) / (250) = "n" / (1,008,000) ;  

Solve for "n" ; {number of cans used each year in Dallas} ;

(250) n = (60,000)(1,008,000) ;

Divide each side of the equation by "250" ;
      to isolate "n" on one side of the equation; & to solve for "n" ; 

     →  { (250) n} / 250 =  [ (60,000)(1,008,000) ] / 250 ; 

to get: 

     →   n = (60,480,000,000) / (250) ; 

     →   n = 241,920,000
________________________________________________________
The answer is:  " 241,920,000 cans " .
________________________________________________________