en.wikipedia.org/wiki/List_of_mathematical_symbols

**x** = **y means x** and **y** represent the same **math** object (Both symbols have the
same value). 2 = 2 1 + 1 = 2. ≠. \ne. inequality. is not **equal** to; **does** not **equal**.

www.mathsisfun.com/algebra/definitions.html

That equation says: what is on the left (x + 2) is equal to what is on the right (6) ...
It is usually a letter like x or y. A number on its own is called a Constant. A
Coefficient is a number used to multiply a variable (4x means 4 times x, so 4 is a
...

mathforum.org/library/drmath/view/63137.html

mean? What does "the difference of x and y" mean? I pretty sure it means x - y. ...
ask yourself, "Is the difference between 7 and 49 equal to 42?

www.mathsisfun.com/sets/function.html

f(x). We say "f of x equals x squared". what goes into the function is put inside
parentheses () after the name of the ... And we usually see what a function does
with the input: f(x) ... means that every element in X is related to some element in
Y.

mathforum.org/library/drmath/view/66166.html

Well, this happens when X = Y, but does it happen elsewhere? ... Well, if X and Y
are different values and f(X) = f(Y), then that means that there ...

www.freemathhelp.com/direct-variation.html

In simpler terms, that means if A is always twice as much as B, then they directly
vary. ... To be more "mathematical" about it, if y varies directly as x, then the graph
of all points that describe this ... What does this mean? ... The equation y = kx is a
special case of linear equation (y=mx+b) where the y-intercept equals ...

www.freemathhelp.com/exponential-functions.html

An exponential function is a mathematical expression in which a variable ... That
equation is read as "y equals 2 to the x power." ... What does it mean? There are
...

www.cut-the-knot.org/arithmetic/Less-Equal-Greater.shtml

... 1 + 1 = 2. So, being equal, does not necessarily mean being the same. ... For
example, (x + y)² = x² + 2xy + y² is a statement that is not supposed to be solved.

www.youtube.com/watch?v=t4gqZXJNm2w

Jul 14, 2011 ... In this video I try to explain what a function in maths is. I once asked myself, why
keep writing y=f(x) and not just y! ... It's a placeholder - it doesn't do anything but it
does represent something. ... So, f can represent very many different things. f=2x
+2y means an operation where you add each x & y va...

www.mathopenref.com/coordhorizontal.html

Definition: A straight line on the coordinate plane where all points on the line ... A
or B and note the line is horizontal when they both have the same y-coordinate. ...
A horizontal line is one the goes left-to-right, parallel to the x-axis of the
coordinate plane. ... As you move to the right along the line, it does not rise or fall ...