MAth

posted by Victoria

Is 3x+8y=5 a function? I am thinking yes

  1. Steve

    the equation describes a function, yes.

    if you want to write y as a function of x, then you have to rearrange things a bit:

    y = (5-3x)/8

  2. Graham

    Well, do you know what a function is?

    A function is an equation where every input has only one output.

    In notation, x is the input. So the question is really asking: "Can x equal anything in following equation which will result in multiple y-values?"

    The best way to figure this out is to isolate y:

    3x + 8y = 5
    3x - 3x + 8y = 5 - 3x
    8y = 5 - 3x
    y = 5/8 - 3/8x

    So, can we get multiple y-values given any x? In this case, the answer is no, so
    3x + 8y = 5 is a function.

Respond to this Question

First Name

Your Answer

Similar Questions

  1. Science

    In an H-R Diagram, the path showing changes in a star's luminosity and surface temperature as a function of time is called its?
  2. Math

    Hi. The question I'm having problems with: Write the body of an iterative function to compute n!, where n! = n(n-1)(n-2)...1. Then, analyze this function where the work unit is the multiplication operation. I think I have the first …
  3. Business

    Apply critical thinking to the decision making process by discussing workplace examples that highlight each of these three types of thinking...creative thinking, logical thinking, and persuasice thinking. Must be a minimum of 200 words.
  4. Math:Polynomial Functions

    h(x) = -7x I was thinking that this was not a polynomial function because -7x is just one term making it a monomial but the answer key says it is a polynomial function. Could someone explain why that is so?
  5. Calculus

    So I have a function of two variables f(x,y)=y^x. where is this function continuous?
  6. science

    Hi again. A question about the digestive system. How does the digestive system help the circulation system to function properely?
  7. math

    Jeff is thinking of a function machine.He says that the output is 5 when the input is 4.What are two different rules that he could be thinking of.
  8. 4th grade math

    Hi! This question says Joe is thinking of o function machine.He says that the output is 12 if the input is 4.what are 2 rules that he could be thinking of for his function machine?
  9. Math

    Given the points (3,52488) and (-4,-393216), determine (a) the linear function , (b) the power function , for these two points. ( N.B. If you use your calculator immediately without thinking, it will say that there are no solutions, …
  10. Math

    Which table shows a function whose range has exactly three elements?

More Similar Questions