11.   Brokers can instantly change any key variable and demonstrate the results in brightly colored bar charts on a computer right in front of you.

12.   But the key variable is that these films were made in English, giving them an instant entree to the biggest world markets.

13.   From Vietnam to the Gulf War, images beamed out by television have arguably been the key variable in molding public opinion.

14.   If it is to move into the homes of less-affluent Americans, price is the key variable, they say.

15.   Johnson said the key variable affecting antitrust decisions is how government attorneys define the size of East Bay hospital market.

16.   Lighting is the key variable in success with indoor plants.

17.   One key variable in how things proceed in the Senate is what route the president ultimately chooses.

18.   Pitching was another key variable in this game.

19.   Spoken language was the key variable, Dr. Hart said.

20.   Television is often the key variable in such equations.