Answer:
The slope of the line, m=-80 and
The equation of the line is,
Step-by-step explanation:
Given that initially the hot tub is filled with 440 gallons of water.
So, at time t=0, the amount of water = 440 gallons.
Further, after 1.5 hours, the amount of water had decreased to 320 gallons.
So, at time t=1.5 hours, the amount of water = 320 gallons.
The point (0,440) and (1.5, 320) are on the line.
So, the slope, m, of the line is
The equation of the line is
Hence, the slope of the line, m=-80 and the equation of the line is, .