8. Straight line graphs

• interpret the equation of a straight line graph in the form y = mx + c
• transform given relationships, including y = axn and y = Abx, to straight line form and hence determine unknown constants by calculating the gradient or intercept of the transformed graph
• solve questions involving mid-point and length of a line
• know and use the condition for two lines to be parallel or perpendicular, including finding the equation of perpendicular bisectors