Let T(x)T(x) be the temperature in degrees Fahrenheit, at an altitude of xx kilometers (km) above sea level for a particular location. At an altitude of 3 kilometers, the temperature is decreasing at a rate of 2 degrees Fahrenheit per kilometer, but the rate of this temperature decrease is slowing. That is, for altitudes above 3 km, the rate of temperature decrease is less than 2 degrees per kilometer. Choose the mathematical statement that best matches this desc