To represent the situation where you start with $314 and spend $25 per day on snacks and souvenirs, you can create the following equation:
- You start with $314.
- For each day on the trip (represented by \( x \)), you spend $25.
The equation can be formed as:
\[ y = 314 - 25x \]
Where:
- \( y \) is the amount of spending money you have left,
- \( x \) is the number of days you have been on the trip.
So, the complete equation is:
\[ y = 314 - 25x \]