What is the slope of a line that is perpendicular to the line y = 1? –1
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-1

Step-by-step explanation:

perp is opposite

parallel is the same slope

so y=1/1 opposite is -1/1

numbers always have to be flipped

and signs also must be flipped

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.