Here are advertised horsepower ratings and expected gas mileage for several 2003 vehicles. Vehicle, Horsepower, Gas Mileage
A, 285, 13
B, 215, 21
C, 194, 21
D, 140, 25
E, 205, 20
F, 127, 29
G, 140, 23
H, 170, 22
Find the correlation between horsepower and miles per gallon.

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?