I think it's the first one but im only in 6th grade and this is 8thhh

yup

Step-by-step explanation:

I think it's J

Step-by-step explanation:

i belive those are the ones that are under 90 degreese.

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.