Pre-Calculus

posted by .

State the domain and range of the relation y = 2x + 3

My answer:
y= 2x+3
y= 2(1)+3=5
domain: 1
range: 5

This is how my book showed me how to do it. I just wanted to make sure I did it right. If not could you please give me an example?

  • Pre-Calculus -

    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 ?

  • Pre-Calculus -

    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!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. calcius

    Determine whether the relation represents a function. If it is a function, state the domain and range. {(-2, 1), (-1, -2), (0, -3), (1, -2), (3, 6)} a. function domain: {-2, -1, 0, 1, 3} range: {1, -2, -3, 6} b. function domain: {1, …
  2. math

    i suck at domain and range.... this doesn't make any sense... a. Given the relation {(-3,-2)(-1,0)(2,-1)(3,5)}, explain why the domain would NOT be -3 <or less than x <or less than 3(-3 <_ x <_ 3) and similarly the range …
  3. Math (pre-calculus)

    Hey! I have a domain and range question! I don't remember how to get these, can you help?
  4. Pre Cal.

    State the doman and range of the relation y= Arc tan x Domain: All real numbers Range= -pi/2 < y < pi/2
  5. Algebra

    23. The ___ axis represents the independent variable. X?
  6. Algebra (Last Question)

    I have - to graph each relation - decide if it is a function - state the domain and the range. 1) {(2,3),(4,-3),(5,1),(-1,3)} how would I decide if something is a function in general?
  7. Algebra

    I think this is a easy trick question, so I probably know the answer but I just wanted to double check. What is the domain and range of the function f(x) = 3^x Find the f^-1 and its domain and range?
  8. precalculus check immediately

    suppoe f is a function with domain [1,3]and range[2,5]?
  9. Math

    For the set of ordered pairs, state the domain, range, and determine whether or not the relation represents a function. (9,9), (7,4), (1,2), (2,6), (5,0) Domain: 9,7,1,2,5 Range: 9, r, 2, 6, 0 It is a function because no x value is …
  10. Math

    HELP PLEASE!!! I'm having some trouble with this question on my Maths hw. Any help is appreciated:) Identify the domain and range of the function. y=-0.25x^2 1. domain: (-oo, 0] range: (-oo, oo) 2. domain: (-oo, oo) range: (-oo, 0] …

More Similar Questions