The initial value of 1,400 represents the distance from your starting point to your final destination.
In the equation \( f(x) = -350x + 1,400 \), when \( x = 0 \) (representing the start of your trip), the value of \( f(x) \) is 1,400. This means that initially, you are 1,400 units (e.g., miles) away from your final destination.