Domain and Range

Domain -all real numbers (x1,x2=infinity)
Range -all real numbers (y1,y2=infinity)

Example: find the range of the relation in the arrow diagram?
3 -- 9
-6 -- 2
5 -- 10

R= {9,2,10}
and the Domain would be D={3,-6, 5}

This is a graph of y=2-x
the x-intercept is at (2,0) and the y-intercept is at (0,-2)

d={" all real numbers"}

r={"all real numbers"}