Posted by Caroline on Tuesday, January 22, 2013 at 12:45am.
Why are you subbing in x = 1 ?
Did you omit some part of the question?
If y = 2x + 3
you have a straight line, which would go on forever,
so the domain is the set of real numbers
and the range is the set of real numbers.
I am sure you are mis-reading what the book does, perhaps there were some limitations placed on the length of the line ?
What they did in their example is substitute x with one. I wasn't exactly sure why they were doing that so I came on here in hopes that someone could better explain it. Thank you!
Related Questions
Math (pre-calculus) - Hey! I have a domain and range question! I don't ...
Help! Math (pre-calculus) - Oy! I don't understand this! How do you ...
Pre-calculus - I want to make sure this is right. the inverse of f(x)=(-3x+2)/(...
College Algebra - Here is the whole question... I have figured most of it out ...
Algebra - 1. What is the mapping of? Domain Range -3 3 -2 -6 -1 0, 15 0 -6 1 -1 ...
Algebra (Last Question) - I have - to graph each relation - decide if it is a ...
trig - can you please show me in steps how to find f(1+a) in this equation f(x...
calcius - Determine whether the relation represents a function. If it is a ...
Pre Cal. - State the doman and range of the relation y= Arc tan x Domain: All ...
Functions - State the domain and range of each function. Justify your answer a) ...
For Further Reading
