Answer:
week 1 < week 2
The graph in the attached figure
Explanation:
we know that
Week 1
The water level is 1.4 cm
Week 2
The water level is 1 1/2 cm
Convert to decimal number
Remember that

Week 3
The water level is -2.1 cm
Compare the values of week 1 and week 2
1.4 cm is less than 1.5 cm
so
The symbol is <
1.4 < 1.5
week 1 < week 2
The graph in the attached figure