Answer:
The relationship between the number of turkey subs delivered in amount charged is not proportional.
Explanation:
We can say that two variables are called proportional when the ratio between these two variables is constant.
Given,
The amount $20 is charged for 3 turkey subs delivered,
The ratio between number of subs and amount charged =
![(3)/(20)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/muz5xahjvcb2cvcfr9fiplqwucpz96gbwj.png)
Also, The amount $26 is charged for 4 turkey subs delivered,
The ratio between number of subs and amount charged =
![(4)/(26)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/9wj7dw7h3v5p8gv97s67m4tx38122owms2.png)
Since,
![(3)/(20)\\eq (4)/(26)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/j2yyw5bcsvu4jwidp4n2kinu3arvt3iici.png)
Hence, the relationship between the number of turkey subs delivered in amount charged is not proportional.