The value of y is directly proportional to the value of x. If y = 45 when x = 180, what is the value of y when x = 90?

22.5

Step-by-step explanation:

Because

180÷2=90

so that would mean

45÷2=22.5

22.5

Step-by-step explanation:

X=180 and Y=45

180/4=45

so we know that by dividing X by 4 we get Y

in that case...

90 / 4 = 22.5

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.