Explanation:
I think there is a typo.
we have no information about her deductions. so, we can only calculate her gross monthly salary and not her net monthly salary.
every year it is increased by €40.
x = number of years after 2010.
salary(x) = 40x + 1600
so, 2010 is 0 years after 2010
salary(0) = 40×0 + 1600 = $1600
2020 is 10 years after 2010
salary(10) = 40×10 + 1600 = 400 + 1600 = $2000