Investigate relationships between tables, equations and graphs 4 credits External
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UNIT OUTLINE:

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KEY TIPS FROM STUDYIT:
 Graphs will involve only linear, quadratic and simple exponential 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).
 You may be asked to write equations for data provided in a table of values or from a graph.
 You may be required to draw graphs, construct tables, or write equations for word problems.
 An understanding of transformations of graphs is expected.
 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.
 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.
 Answer the question in the context that is given. Use commonsense to check your answer.
 Reread the question to check that you have answered the question asked.
 A graph may be made up of two different functions (piecewise graph). It could be made up of two lines, or part of a parabola and a line.
 Understand the difference between graphs representing situations involving continuous data and graphs representing situations involving discrete data.
 Attempt all questions as evidence from higher level questions may be used in awarding credit for a lower grade.