Home > Subjects > Mathematics > Level 1 - CAS Mathematics > 1.2 Graphs (AS90800) > Key tips
- Subject: Mathematics
- AS: 90800
- Level: 1
- Credits: 3
- External
CAS Mathematics 1.2 Demonstrate an understanding of the features of graphs
Key tips
- Graphs will involve only linear and quadratic functions.
- Features could include x and y intercepts, maxima and minima, axes of symmetry, domain and range, and gradients of straight lines (rates of change).
- An understanding of transformations of graphs is expected.
- Computer Algebraic Systems (CAS) technology may be used.
- Use a ruler for drawing line graphs.
- Look carefully at the scales on each axis. When working out the gradient do not simply count squares – remember to check how many units each grid line represents first.
- Answer the question in the context that is given. Use commonsense to check your answer.
- Know the difference between ‘intercept’ and ‘intersect’. An intercept is a point where the graph crosses the axes. Intersect means cross or meet.
- Parabolas should be smooth curves with a rounded turning point (vertex).
- Show your working clearly in correct mathematical steps. Give a full sentence stating your answer.
- Reread the question to check that you have answered the question asked.
- Attempt all questions as evidence from higher level questions may be used in awarding credit for a lower grade.
- You may be asked to form equations of linear graphs within a context for Achievement with Merit, and for quadratic graphs for Achievement with Excellence.
