Q: What is variable and example of variable?

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Yes. It is a continuous variable. As used in probability theory, it is an example of a continuous random variable.

A variable in algebra is an unknown quantity as for example in the term 5y the variable is y

A dependent variable is simply a variable (for example: y) whose value depends on that of another.

Variable means something that changes. X, for example, is a variable, as it can be many different numbers.

int x; "Example"

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Yes. It is a continuous variable. As used in probability theory, it is an example of a continuous random variable.

is the variable of x an example of abstract representation

A variable in algebra is an unknown quantity as for example in the term 5y the variable is y

Here is a example. "I wrote variable in a sentence."

dependent variable

Just the number, for example: 7x the variable is 7. The variable is the number without the variable(x,y,z, etc.)

A variable is a symbol the represents another number. Example: 2y - 5y Y is the variable.

You write an equation that involves an independent variable (for example "x"), a dependent variable (for example "y"), and the first derivative, or higher-level derivatives, of the dependent variable (for example, dy/dx).

A controlled variable is a setting where the dependent variable is not controlled by the independent variable. For example, if you were trying to measure the rate of movement in an organism in highly salty concentrations, a controlled variable would include the organism in an environment with no salt at all.

is insurance premiums for fire insurance an example of variable cost?

It is the variable as for example in the term 4y it is y that is the variable

A dependent variable is simply a variable (for example: y) whose value depends on that of another.