1. Algebra – Linear Functions By the end of this lesson you will be able to identify and calculate the following: 1. The x- and y-intercept method

2.  The x- and y-intercept method  Observe that any oblique (sloping) line crosses both axes at the points known as the x-intercept and the y-intercept. Furthermore, the x-intercept and the y-intercept are two distinct points and so can be used to determine the linear graph.

3.  The only exception is the case of lines passing through the origin. These lines go through each axis at x = 0 and at y = 0; therefore the origin (0, 0) is the single point, which represents both intercepts.  Since we need two points to sketch the line, in the case of the lines passing through the origin, we can use only the gradient–intercept method. In all other cases we can also use the x- and y- intercept method. To sketch the line, using this method, follow these steps.

8.  Your turn…  Complete - Questions 2 – 5 all - Skill Sheet 6.9 - Skill Sheet 6.10 Exercises and Skill Sheets are in your booklets All questions are + ++++++++++++++++++++ + ++ +++++++++++++++++ +++++++ to be answered in your math book!