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Series 4: Cartesian graph: find the function
This provides a set of short movies showing a Cartesian graph, with a point that fleetingly shows the coordinate values x and y as it moves. The tasks correspond to the 'Mapping diagram' tasks, and students are again asked to find the relation between x and y.
Cartesian graph: find the function (A)

Here the function is y = 2x + 9.

Cartesian graph: find the function (B)

Here the function is y = 4x + 1.

Cartesian graph: find the function (C)

Here the function is y = 5x - 19.

Cartesian graph: find the function (D)

Here the function is ...

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