In this question, each package has 8 notecards. one notecard costs $8 2 notecards cost $16 3 notecards cost $24 if n - number of packages d - selling price in dollars We can see that with each additional notecard bought the cost increases by $8 therefore there's a proportional relationship between n and d As n increases, d increases by the same amount. if we put it in an equation, d = 8*n n - 1 package and d is 8 if n - 2 d = 8*2 d = 16 Therefore we can use the following equation; d=8n
