Question 205718
Domain  is  the  set  of  the  independent  variable,  usually  x,,
.
while  Range  is  the  set  of  the  dependent  variable,  usually  y
.
Physically  Domain  might  be  time  while  Range  is  Weight,  for  a  diet  log
.
or Domain  might  be  elapsed  time vs  Range , distance, for  a  travel  log,
.
Usually  Domain  and  Range are  expressed  as,  "all  Real  Numbers"
.
or  " all  positive  Real  Numbers"
.
Exceptions  occur  when  the  value  of  the  function, dependent  variable, is 
.
UNDEFINED,(denominator  is  zero),or COMPLEX (square root of a negative  number)
.