Answer:
![y = 12.5x + 30](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ab500dwimcjp6wmgrlaowjf53iwz6manwu.png)
Explanation:
We are given the following information in the question:
Cost of a holiday meal = $12.50
Delivery fee = $30
Cost(y) represents the amount a holiday meal including delivery for x people.
![cost = (\text{Cost of meal}* x) + \text{Delivery chareges}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/u3dpqzh44b22in8l5ydoun136b96qjbwv5.png)
Putting all the values,
![y = 12.50* x + 30\\y = 12.5x + 30](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ajxb7n5rpfpmnogpv1itoobsm8ha4b6ysx.png)
The above equation gives the total amount of holiday meal for x people including the delivery charges.