20 comics for $5.00 seth buys 30 for $7.50 what is the sale price per comic

Given parameters:

 20 comics costs $5

  30 comics costs $7.50

Unknown:

Sale price per comic =   ?

Solution

The sale price per comic is ;

       =

       =  

       = $0.25 per comic

The cost per comic is $0.25 per comic

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .