Question

How do you find the domain and range of a function?

Answer 1

Domain is the input and/or x
Range is the output and/or y
So to find the domain you would look for the x axis in a graphed function, the input on a table, or the numbers in a problem that would be on that axis or side of the table. Same for range 

Answer 2

Domain and range can be found from the graph ...
Domain is the values of x-coordinates and Range are the values of y-coordinates .
FOR EXAMPLE:
(1,6)(8,2)..... 1 and 8 are x-coordiantes and hence DOMAIN.
6 and 2 are y-coordinates and hence RANGE.