Chapter 2: Linear Relationships Notes

Sections

1. 2A Graphing linear relationships Mastered

   Making a table of values from a rule, plotting real data with sensible axes, recognising a linear relationship, and reading values from the graph by interpolation and extrapolation.

   Open notes
2. 2B Gradient and intercept in context Mastered

   Finding the gradient of a line as rise over run, reading it as a rate with units, and interpreting the vertical intercept as the starting value or fixed cost.

   Open notes
3. 2C Writing the rule y = mx + c Mastered

   Writing a linear rule in the form y = mx + c from a description, from a graph, or from two data points, using letters that suit the context.

   Open notes
4. 2D Direct variation Mastered

   Relationships of the form y = kx, finding the constant of variation from one pair of values, conversion graphs such as currency, and telling direct variation apart from other linear models.

   Open notes
5. 2E Linear models and their limits Mastered

   Using linear models to compare plans and find break-even points, cost and revenue for a small business, and recognising when a straight-line model stops making sense.

   Open notes