Linear Functions (A) will review lines parallel to the x and y axis as well as introduce straight lines in the form y = mx + c.

Section A kicks off with eight equations of lines in the form x = a and y = b which pupils will plot on the same set of axes before considering the intersections of pairs of these lines.

In section B, pupils will plot five functions on their own coordinate grids. The functions are y = x, y = 2x, y = x - 3, y = x + 4 and y = 2x + 1. A table of values is included in each case, and pupils will plot the lines for positive and negative values of x. We encourage pupils to write their values for x and y as coordinate pairs before plotting them.

Ensure pupils are equipped with a pencil and ruler before they start drawing their straight lines.