Which of these numbers is divisible by 9? A 123 B 234 C 345

Lecture #2 Week 1 Sapling Learning Edition Precalculus Chapter 2.1 Functions Key Questions What is an input A: An input rep resents xin a function or relation What is the domain A: The domain is all the possible input values for functions and relations What is an unspecified domain A: No domain is specified in a function. Since no domain is specified, this means that the domain will start from the largest set of real numbers What is an output A: An ou tput represents yin a function or relation. What is the range A: The range is all the possible output values for functions and relations. What is a relation A: A relation is any number of input to output. In this case, it doesn’t matter if one input has more than one output. It will still be a relation