GM5-8: Interpret points and lines on co-ordinate planes, including scales and bearings on maps.

Elaboration on this Achievement Objective

This means that students will use co-ordinate axes including positive and negative integers and decimals. Straight lines will be described using equations or co-ordinate pairs, for example y = x + 4, or “the line that passes through (-4, 0.5) and (2, 1.5)”.

Students will interpret points and lines on a map by calculating distances using map scales and directions using compass bearings for example 210o. At Level Five students should be using multiplicative and proportional strategies to interpret scales, and interpreting compass bearings involving angles. For example they should be able to identify the approximate location of a person on a map given two bearings to that person from given landmarks.