Answer:
[tex]s = k \cdot \left(\frac{n}{100} \right) \cdot m_{max}[/tex]
Step-by-step explanation:
The number of miles is directly proportional to the amount of gas, then:
[tex]s \propto m[/tex]
[tex]s = k\cdot m[/tex]
Where the amount can be modelled as the product of the maximum amount of gas and the percentage of occupied capacity. Hence:
[tex]s = k \cdot \left(\frac{n}{100} \right) \cdot m_{max}[/tex]