The temperature in Minsk was recorded over a period of four hours. The equation
y= -5x + 54
describes the temperature over this time, where y is the temperature in
degrees Fahrenheit (F) and x is the number of hours since measurements
started. Which of the following statements correctly describes the
temperature?
A. It was -5°F when the temperature was first measured, and it is
rising by 54 degrees per hour.
B. It was -5°F after four hours, and it is rising by 54 degrees per hour.
C. It was 54°F when the temperature was first measured, and it is
dropping by 5 degrees per hour.
D. It was 54°F after four hours, and it is dropping by 5 degrees per
hour.