It is very common to use, but it is not the only variable you can use.
Not always. It could be a constant. For example x is one variable, and y = x-2 is another variable. Then x - y = x - (x-2) = 2.
Yes. A variable by itself, or anything that contains a variable, would be a variable expression (unless the variable cancels out, as in "x - x", which always has the same value).
The independent variable is always on the x-axis of a coordinate plane. The dependent variable is always on the y-axis. This is true because y always depends on x.
By convention, 'x' is almost always the independent variable, but it doesn't have to be.
In an experiment or mathematical function, the independent variable is the one that is manipulated or changed to observe its effect on another variable, known as the dependent variable. If "x" is the variable being changed or controlled, then yes, "x" is the independent variable. However, if "x" depends on or is influenced by another variable, then it is not the independent variable. Always consider the specific context to determine the role of "x."
the y variable always changes and x is constant
Not always. It could be a constant. For example x is one variable, and y = x-2 is another variable. Then x - y = x - (x-2) = 2.
Yes. A variable by itself, or anything that contains a variable, would be a variable expression (unless the variable cancels out, as in "x - x", which always has the same value).
x is used a lot to represent an independent variable. When time is the independent variable t is often used as well.
The independent variable is always on the x-axis of a coordinate plane. The dependent variable is always on the y-axis. This is true because y always depends on x.
By convention, 'x' is almost always the independent variable, but it doesn't have to be.
In an experiment or mathematical function, the independent variable is the one that is manipulated or changed to observe its effect on another variable, known as the dependent variable. If "x" is the variable being changed or controlled, then yes, "x" is the independent variable. However, if "x" depends on or is influenced by another variable, then it is not the independent variable. Always consider the specific context to determine the role of "x."
Since y depends on x and x is the independent variable, y has to be the dependent variable. That means that y always changes because of x.
x=3 means that the x variable always stays constant, so the y variable can change as much as it wants, but x will always be 3. on a graph, this would like a vertical line. (It should be perpendicular to the x variable's line...if that helps a visual:P)
The dependent variable may change in response to the manipulated variable.
An independant variable should always be on the x-axis of a graph and the dependant variable on the y-axis.
Always when using a line graph use the x-axis for independent variable and the y-axis for dependent variable.