16 to 19 year old male and females are __ times are more likely to be involved in a crash.
a. 2.7
b. 3.7
c. 1.7
d. 0.7

C. 2.7

Explanation:

According to the official website of Californian traffic statistics for both men and women, drivers aged 16 to 19 years of age have the highest average fatal and injury crash involvement per 1,000 driver by age group. ... The crash rate for 16 to 19-year-old is 2.7 times higher than drivers of all ages. ... them to take more risks, especially for young males riding with young male drivers.

to answer your question:

f(x)= a^x.  if x=0, f(x)=1  if x=1, f(x)=a  if x=1, f(x)=a^a