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