Given y a x where y is 6 and x is 2, find y when x is 7?

7 Answers

Relevance
  • david
    Lv 7
    4 weeks ago

    y a x where y is 6 and x is 2, find y when x is 7?

    I will guess that y a x  .. is y is directly proportional to x

      y/x = y/x

      6/2 = y/7  <<<  solve for y

       y = 21  <<< answer

    • Login to reply the answers
  • 4 weeks ago

    y a x ?? what does this mean ?

    • Login to reply the answers
  • ted s
    Lv 7
    4 weeks ago

    21would be a reasonable answer if you are measuring linearly

    • Login to reply the answers
  • 4 weeks ago

    If you were trying to say y is proportional to x, then the answer is

    7*(6/2) = 21.

    • Login to reply the answers
  • How do you think about the answers? You can sign in to vote the answer.
  • 4 weeks ago

    need a bit more information...

    like suppose y = x + 4 then y = 6 when x = 2 and hence y = 11 when x = 7

    but suppose y = x^2 + 2 then y = 6 when x = 2 and y = 51 when x = 7

    • Login to reply the answers
  • alex
    Lv 7
    4 weeks ago

    rule:

    assume y ∝ xthat is y = kx , with constant k≠0

    • Login to reply the answers
  • 4 weeks ago

    I'm not sure of your notation (y a x). I believe you are trying to say that y is directly proportional to x:

    y ∝ x

    Another way to write that is:

    y = kx, where k is a constant of proportionality.

    We are given one case when y = 6 and x = 2, so plug those in and solve for k:

    6 = k * 2

    6/2 = k

    k = 3

    So the final equation is:

    y = 3x

    That basically says that the value of y is 3 times the value of x.

    Now we can easily figure out any x or y, given the other variable. For example, when x = 7

    y = 3(7)

    y = 21

    Answer:

    y = 21

    • Login to reply the answers
Still have questions? Get your answers by asking now.