The water level in a glass decreases 0.4 cm each hour due to evaporation. At the beginning of the experiment, the water level is 12.6 cm.
Let z represent time in hours, elapsed since the beginning of the experiment and let y represent the water level, in
centimeters.
Part A
Construct a linear function, using 2 and y from above, that determines the water level at a given time, in hours, after
the experiment begins.
Part B
How many hours does it take for all of the water to evaporate?
hours

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