A bar chart where each category has two bars instead of one. This is used when two frequencies exist for a category. This type of graph allows for comparisons to be made between the two sets of values.
A command word that, when used in transformation questions is asking for:
If it is a reflection: A reflection in the line….(and then the equation of the mirror line) If it is a translation: A translation by the vector…. (giving the vector). You may also say ‘A translation by ___ to the right and ___ up’. If a rotation: A rotation _______(give clockwise/ anticlockwise) by _____(give the angle) about the centre _____ (give the coordinate of the centre). In an enlargement: An enlargement of scale factor ____(give the scale factor) about the centre ___(give the centre of enlargement).