Club drugs: ticket to the emergency room.

• Position: Graph Exercise

In recent years, "club drugs," named for their use in nightclubs and teenage raves, have gained enormous popularity. Public-health experts say these drugs, mostly synthetic chemical stews, have attracted young people because of the false belief that they are neither as harmful nor as addictive as drugs like cocaine and heroin. What many teens don't know is that drug purity varies. Dealers often mix in other drugs when their supplies run low. The data in this graph show numbers of emergency-room admissions linked to three popular club drugs. Names in parenthesis are popular street names' of each drug.

Source: U.S. Drug Enforcement Administration

1. About how many emergency-room admissions were due to Ecstasy use in 1994?

2. In which two years did emergency-room admissions linked to Rohypnol use remain almost exactly the same?

3. What is the approximate difference between the number of emergency-room admissions for GHB and Ecstasy use in 1999? About (a) 500 (b) 250 (c) 100.

4. Look at the years 1994 and 1998. What was the approximate increase in the...