Functional Relationship Meaning
Once the regression model is observed to be statistically and practically significant, the third step is to explain the functional relationships between the dependent and the independent variables using the first and the second table of the Figure 4.
Explanation for Slope
Fuel cost increases by 0.06017 USD per mile distance traveled.
Explanation for Intercept
Intercept, 5.531 is the fuel cost associated with the zero x-value, meaning that there will be a 5.531 fuel cost even if no distance is traveled.