# What are the independent and dependent variables in math?

Variables are the symbols or letters in math equations whose values can change. There are two types of variables; **independent variables, which don’t rely on other variables to find their values, and dependent variables, which must rely on other independent variables to find their values**.

## What is an example of a dependent variable in math?

A dependent variable is a variable in an expression that depends on the value of another variable. For example, **if y = 2x, then y depends on x**. So, if x = 1, then y = 2.

## What is the independent and dependent variable examples?

Independent variable causes an effect on the dependent variable. Example: **How long you sleep (independent variable) affects your test score (dependent variable)**. This makes sense, but: Example: Your test score affects how long you sleep.

## Which is the independent variable?

Question: What’s an independent variable? Answer: An independent variable is exactly what it sounds like. It is **a variable that stands alone and isn’t changed by the other variables you are trying to measure**. For example, someone’s age might be an independent variable.

## How do you know if a variable is independent?

You can tell if two random variables are independent **by looking at their individual probabilities**. If those probabilities don’t change when the events meet, then those variables are independent. Another way of saying this is that if the two variables are correlated, then they are not independent.

## What is an independent in math?

An independent variable is **a variable that represents a quantity that is being manipulated in an experiment**. x is often the variable used to represent the independent variable in an equation.

## What is variable in math algebra?

variable, In algebra, **a symbol (usually a letter) standing in for an unknown numerical value in an equation**. Commonly used variables include x and y (real-number unknowns), z (complex-number unknowns), t (time), r (radius), and s (arc length).

## How do you know if two variables are independent or dependent?

**The independent variable is the cause.** **Its value is independent of other variables in your study.** **The dependent variable is the effect.** **Its value depends on changes in the independent variable.**

## What are dependent random variables?

Two random variables are called “dependent” **if the probability of events associated with one variable influence the distribution of probabilities of the other variable, and vice-versa**.

## How do you calculate B or PA?

The probability of two disjoint events A or B happening is: **p(A or B)** **= p(A) + p(B)**.

## What does it mean when two variables are independent?

Intuitively, two random variables X and Y are independent **if knowing the value of one of them does not change the probabilities for the other one**. In other words, if X and Y are independent, we can write P(Y=y|X=x)=P(Y=y), for all x,y.

## Is y the independent or dependent variable?

The independent variable belongs on the x-axis (horizontal line) of the graph and the **dependent variable** belongs on the y-axis (vertical line).

## What does dependent mean in math?

A dependent variable is **a variable whose value depends upon independent variable s**. The dependent variable is what is being measured in an experiment or evaluated in a mathematical equation. The dependent variable is sometimes called “the outcome variable.” In a simple mathematical equation, for example: a = b/c.

## What are 3 types of variables?

A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: **independent, dependent, and controlled**.