1. Linear in Parameters
The first assumption, that the data is linear in parameters is satisfied because we will not manipulate the independent (gas price, consumption, saving, and others) and dependent (GDP) coefficients except by multiplying them by constants, which is a linear change. Even by using logarithms on certain variables, we made sure that all parameters were related together in a linear fashion.
2. Random Sampling
The data can assumed to be collected from random samples, even though we did not collect the data first hand, because all the data we used was collected by the World Bank.
3. No Perfect Collinearity