Question

10 points
Question 2: A lake near the Arctic Circle is covered by a 3.8 meters thick
sheet of ice during the cold winter months. When spring arrives, the
warm air gradually melts the ice, causing its thickness to decrease at a
constant rate. After 7 weeks, the sheet is only 2.4 meters thick. Let y
represent the ice sheet's thickness (in meters) after x weeks. Which
equation would best represent this situation? *
O
y = -0.2x + 2.4
O
y = -0.2x + 3.8
O
y = 0.2x + 3.8
O
y = 0.2x + 2.4

Answer 1

Answer:

  y = -0.2x + 3.8

Step-by-step explanation:

The initial ice thickness is 3.8 m, so that is the constant we expect in the equation.

The thickness is decreasing, so we expect a negative coefficient for x.

The appropriate choice is ...

  y = -0.2x + 3.8