UPCI I REVIEW This Question: 1 pt 2 of 28 (1 complete) v The graph shows the percentage of high school seniors who used alcohol or marijuana during the 30 days prior to being surveyed. The data can be described by the following mathematical models, where n is the number of years after 1980, A is the percentage of seniors using alcohol, and M is the percentage of seniors using marijuana A= -0.8n +57 M= -0.5n+24 Alcohol and Marijuana Use by High School Seniors Alcohol Percentage 80 70 60- 50- 404 30- Marijuana 20- 10- 0+ 1980 1985 1990 1995 2000 '05 '09 Year a. Use the appropriate line graph to determine the percentage of seniors who used marijuana in 1985 30 % (Type a whole number.) b. Use the appropriate formula to determine the percentage of seniors who used marijuana in 1985. % (Type an integer or a decimal.) Does the formula underestimate or overestimate the actual data shown by the graph? By how much? The formula by% c. Use the appropriate line graph to estimate the percentage of seniors who used alcohol in 1985. Tor it. -- Click to select your answer(s). (1,1) More Type here to search​