# 3.1 Theory B - The formula y = ax + b

The formula of the line is y = 2x + 3.
When x increases by 1, y increases by 2.
This means that going 1 to the right in the graph results in going up 2.

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The formula of the line is y = 2x + 3.
When x increases by 1, y increases by 2.
This means that going 1 to the right in the graph results in going up 2.

Download our apps here: