How do I identify the domain and range of a relation or function?

All of the values that can go into a relation or function (input) are called the domain.

All of the values that come out of a relation or function (output) are called the range.

The domain is the set of all first elements of ordered pairs (x-coordinates).

The range is the set of all second elements of ordered pairs (y-coordinates).

Only the elements "used" by the relation or function constitute the range.

EXAMPLE:

State the domain and range of the following relation:

(eye color, student's name).

A = {(blue,Steve), (green,Elaine), (brown,Kyle), (blue,Marsha), (brown,Miranda), (green, Dylan)}   State whether the relation is a function.

Solution: Domain: {blue, green, brown}.    

                Range: {Steve, Elaine, Marsha, Miranda, Dylan}.

No, this relation is not a function. The eye colors are repeated.

sorry for the long answer. I hope i was a help!

like my answer

a precentage of 6th graders. the population is all 6th graders. let me know if i'm wrong, i hope this ! : )

step-by-step explanation:

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5