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Australian Curriculum Mathematics/Mathematical Methods/Functions and Graphs

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Australian Curriculum Content[1]

Lines and linear relationships:

  • determine the coordinates of the midpoint of two points
  • examine examples of direct proportion and linearly related variables
  • recognise features of the graph of , including its linear nature, its intercepts and its slope or gradient
  • find the equation of a straight line given sufficient information; parallel and perpendicular lines
  • solve linear equations.

Review of quadratic relationships:

  • examine examples of quadratically related variables
  • recognise features of the graphs of , , and , including their parabolic nature, turning points, axes of symmetry and intercepts
  • solve quadratic equations using the quadratic formula and by completing the square
  • find the equation of a quadratic given sufficient information
  • find turning points and zeros of quadratics and understand the role of the discriminant
  • recognise features of the graph of the general quadratic .

Inverse proportion:

  • examine examples of inverse proportion
  • recognise features of the graphs of and , including their hyperbolic shapes, and their asymptotes.

Powers and polynomials:

  • recognise features of the graphs of for , and , including shape, and behaviour as and
  • identify the coefficients and the degree of a polynomial
  • expand quadratic and cubic polynomials from factors
  • recognise features of the graphs of , and , including shape, intercepts and behaviour as and
  • factorise cubic polynomials in cases where a linear factor is easily obtained
  • solve cubic equations using technology, and algebraically in cases where a linear factor is easily obtained.

Graphs of relations:

  • recognise features of the graphs of and , including their circular shapes, their centres and their radii
  • recognise features of the graph of including its parabolic shape and its axis of symmetry.

Functions:

  • understand the concept of a function as a mapping between sets, and as a rule or a formula that defines one variable quantity in terms of another
  • use function notation, domain and range, independent and dependent variables
  • understand the concept of the graph of a function
  • examine translations and the graphs of and
  • examine dilations and the graphs of and
  • recognise the distinction between functions and relations, and the vertical line test.

Linear Equations

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Identify the slope and intercepts of the following equations:


























Graph the following linear equations:

























Lines and Linear Relationships

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Midpoints

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Say we have two points and . The midpoint between these points is given by:



Example

Find the midpoint between the points and

Find the coordinate:



Find the coordinate:

The coordinates of the midpoint are:

Find the coordinates of the midpoint between the following points:

  1. and

  2. and

  3. and

  1. and

  2. and

  3. and

  1. and

  2. and

  3. and

Linear Functions

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Sketch the graph of the following linear functions showing all key features:



















Hyperbolic functions

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Sketch the graphs of the following hyperbolic functions, including all key details including asymptotes:



















Solutions

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  1. and
  2. and
  3. and
  1. and
  2. and
  3. and

References

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  1. Source: Australian Curriculum, Assessment and Reporting Authority (ACARA), downloaded from the Australian Curriculum website on (5 October 2015).