Independent and Dependent Variables

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Overview

An independent variable is an unknown number.
A dependent variable is an unknown number that changes depending on the independent variable.

For example…

Sarah always eats 3 times as many cookies as Joey. Write an expression to represent
the relationship between the number of cookies Sarah eats and the number of cookies Joey eats. Identify the independent and dependent variables.

We can represent the situation with the expression  s = 3j

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Use the table below to answer question.
Solve for y when x = 4.

Use the table below to answer question.

When x increases, y ____________.
A. Increases
B. Decreases
C. Stays the same

Use the table below to answer question.

Which letter is the dependent variable?

Use the table below to answer question.

Which letter is the independent variable?

Use the table below to answer question.

Solve for y in the table. Then graph the points on the coordinate plane below.

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