Question

What is the domain and range of each function graohed below?

Answer 1

Domain is the x values you can use
range is the y values



a.
the domain
hmm, seems to be all real numbers except for at x=0, it gets really close tho
so D=(-∞,0)U(0,∞)

range is all real numbers except for y=0, it gets really close tho
R=(-∞,0)U(0,∞)



b.
domain
that empty circle means something like < or >
goes from 5 to 6, not including 5
so domain is D=(5,6]

range is from -4 to 2, not including -4
range is R=(-4,2]

Answer 2

Check the picture below.

notice the holes, the excluded values, on the first one,due to an asymptote, on the second one, is in the line itself.