Final answer:
The net income per day for the taxi driver is $0.
Step-by-step explanation:
To calculate the net income per day for the taxi driver, we need to subtract the expenses from the revenue. The fixed rental cost is $80 per day. The fuel expense per mile driven is $0.3, and since the taxi driver plans to drive for 400 miles each day, the fuel expense will be 400 * $0.3 = $120. The revenue per mile driven is $0.5, so the daily revenue will be 400 * $0.5 = $200. To calculate the net income per day, we subtract the expenses ($80 + $120) from the revenue ($200): $200 - ($80 + $120) = $200 - $200 = $0.