Chapter 9: Linear relationships Notes

Sections

1. 9A The Cartesian plane and plotting lines Mastered

   Coordinates in four quadrants, tables of values from a rule, plotting straight lines and checking whether a point lies on a line.

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2. 9B Finding the rule Mastered

   Finding a linear rule from a table of values or a pattern by using the constant difference and the value when x = 0.

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3. 9C Intercepts and graphical solutions Mastered

   Finding the x- and y-intercepts of a line, sketching with intercepts, and solving equations or pairs of equations from where lines meet.

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4. 9D Gradient Mastered

   Gradient as rise over run, positive, negative, zero and undefined gradients, and the gradient between two points.

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5. 9E Gradient-intercept form y = mx + c Mastered

   Reading the gradient and y-intercept from y = mx + c, writing the equation of a line, rearranging into gradient-intercept form and sketching lines.

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6. 9F Non-linear graphs Mastered

   Recognising and plotting simple non-linear relationships such as parabolas y = x² + c, and telling linear from non-linear rules and tables.

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