Hello there. To solve this question, we'll need to find the equation that models that situation.
The height level above the normal of the sea was 15mm on the year 2000 and it is rising 3mm per year.
Say x is the number of years passed since this year. Of course, the amount of water that will have rised is given by: 3x.
Then, this height, given by the variable y, can be found by the equation:
y = 15 + 3x.
Considering x greater or equal to zero, since there are no negative years.
This is the answer contained in the second option.
