Mathematical Equations - what is the value of 'Y'?

Answer 1

y is the independent variable and so its value will depend on the value of x in a given equation of the form y=f(x)

Answer 2

You question is not very clear but I hope this helps.

For there to be an equation Y has to equal something. Usual Y is a function of another variable called X. So whatever value X takes then you can work out the value of Y. X is called the independant variable and Y is called the dependant variable. What this means is that X is the quantiity that varies and then Y varies because it is dependant on the value of X. In mathematics this is an accepted way of expressing this idea. Of course, it could have been the other way round but at sometime in the past mathematicians decided X would be the independant variable and Y the dependant variable. Sometimes, other letters are used. What is important is that you know the difference and if you use other letters say which is the dependant variable and which is the independant variable.

When we say Y is a function of X we write it as Y =f(X)

Now, all that says is that Y varies as a function of X. It doesn't tell you exactly how it varies. So we could have:

Y = aX where a is a constant called the coefficient whose value has to be found or given. Here f(X) = aX

We could have Y = aX^2 + bX + c. This is a quadratic equation where the value of Y depends on the value of X and the constants a, b and c. Here f(X) = aX^2 + bX + c.

Sometimes Y is a function of two or more variables. For example Y could vary as a function of X and another variable which we could call P. Here the value of Y will depend on the value of X and P.

Equations can become very complicated but the same principles apply.

Answer 3

Gopal is wrong. Y is the DEPENDENT variable.

X is the independent variable. Independent means that its value is not determined by another variable's value. For example,

Y = 2X + 4

If X = 2, then Y = 2(2) + 4 = 4+4 = 8

Hope that helps.

Answer 4

there is no equation to solve

if you have the equation
y=x^2+c

'y' is the sum of the independent variable
to the power of two and the constant 'c'

here,'y' is the dependent variable,'x' is
the independent variable and 'c' is an
arbitrary constant

i hope that this helps

Answer 5

'Y' is just a variable and since you have not stated the equation by which it's related to anything else then you can't state wht it's value is. It;s like asking us 'y' is thingy which i'm not telling you, what is the thingy and 'y'. No useful answer there.

John

Answer 6

thats like asking what is the value of "something" Y is some unknown. If theres an actual problem you need to figure out you need to post that problem

Answer 7

Y doesn't have a set valuable, its just a Variable- so it can be anything. Your maths teacher doesn't have to use X or Y----they could quite as easily use a wiggly line or a smiley face!

Answer 8

y is a variable and can stand for almost any number

Answer 9

y can be whatever you want it to be

unless it is properly defined (eg y=5, or y=x+3+pi), then it can be any number (real or imaginary) you want it to be !!!

Answer 10

where is the equation?