Khan Academy
Dependent & Independent Variables
Which quantity you choose and which one depends on it.
Watch on YouTubeWhat you choose vs. what changes because of your choice.
Read this first — it covers the idea in plain language with a worked example.
The independent variable is the input — the value you choose (like hours worked). The dependent variable is the output — the value that depends on it (like money earned).
You earn $9 per hour. Identify the variables.
Tip
Ask yourself: which value causes the other to change? That cause is the independent variable.
Watch the main video, then check the second take if you want another explanation.
Which quantity you choose and which one depends on it.
Watch on YouTubeIdentify input and output in tables and graphs.
Watch on YouTubeTry a worksheet or work through some problems before the quiz.
A couple of questions to make sure this topic stuck. Retake as many times as you want.
Independent & Dependent Variables
In y = 4x, x is the dependent variable.