Final answer:
The relationship between BAC levels and the likelihood of being involved in a fatal accident is positive. Higher BAC levels correlate with increased impairment and a higher chance of accidents.
Step-by-step explanation:
The relationship between a driver's BAC (blood-alcohol concentration) and getting into an accident that kills someone is positive. This means that as the BAC level increases, the likelihood of being involved in a fatal accident also increases. This is supported by evidence that shows the impairment of driving skills as BAC levels rise. In most jurisdictions, a BAC of 0.08% is considered legally drink, with higher levels causing more severe impairment. The probability of driver error leading to fatal accidents is higher when alcohol is involved.