In a recent survey, a 17-year old gave a movie a score of 9, while a 72-year old gave it a score of 3, a 48-year old gave it a score of 5 and a 42-year old gave it a score of 5. Based on these four surveys, what is the correlation between age of movie-goer and score for the movie

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?