Match the like terms. -5x³ 7y 6a² -12x² a -x 1. 8x² 2. -2a 3. 15x³ 4. 1x 5. a² 6. 12y

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.