What does y mean in Math?
In math, [katex] y[/katex] is generally used as an unknown variable. we use [katex] y [/katex] as a variable just like [katex] x [/katex] .
[katex] x [/katex] is also used as a variable in Algebra
‘ [katex] y [/katex] ‘ holds the place of a number that we may not know just yet in pre-algebra. We use this symbol when we don’t know how many we have of something or when the number of them can change.
[katex] y + 4 [/katex] means we add [katex] 4 [/katex] to whatever we decide [katex] y [/katex] stands for. [katex] y [/katex] could be any number, so we’re just holding its place with the variable
Why are X and Y used in Algebra?
In short, it is the [katex] English [/katex] (or Latin) version of the Greek letter [katex] χ [/katex] (chi), which was the first letter of the transliteration of the Arabic word for ‘something’, which was used in the original algebra texts. Since [katex] x [/katex] was commonly used for one unknown, it made sense to use [katex] y [/katex] as a second, and [katex] z [/katex] as a third unknown.
What does y=y(x) Mean?
In Algebra [katex]y[/katex] is a variable we use [katex]y[/katex] in different ways, mostly an unknown variable.
If we write [katex]y=y\left(x\right)[/katex].It means [katex]y[/katex] is a dependent variable and depends on x. We may also called [katex]y=y\left(x\right)[/katex] a function.
we mostly use this function in calculus and Analytical geometry.