Question 52654
Determine if each of the following is a relation or a function. Tell why and give the domain and range of each one.
a) (0,1)(4,1)(6,2)(2,0).
each first member has a unique image.hence it is a function
domain is 0,4,6,2
range is 1,2,0

b) y=6 over 2x-1
y=6/(2x-1)
each x has a unique image.hence it is function.
domain is all real numbers except x=0.5 since in such a case it would result in division by zero which has no meaning.
 range is all real numbers except 0,since y canot be zero for any finite value of x