Modelling with Straight Lines (AQA AS Maths): Revision Note
Exam code: 7356
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Modelling with straight lines
What is modelling with straight lines?
Modelling means applying the mathematics to a real-life situation
The model is used to find or predict future values
Models will often need refining to improve their accuracy
How do I work with straight line models?
Turn the words from the question into mathematical equations
In y = mx + c constants “m” and “c” will have a meaning
gradient “m” will be the rate of change
eg extension in a spring per 1 kg of mass added
y-axis intercept “c” will be the initial value
eg resting length of a spring
The skills needed are covered in the other pages of the section Equation of a Straight Line
Worked Example
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