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

 In the beginning of this unit it was shown how the graph of a straight line, whose rule is given, could be obtained by plotting a number of points and joining them together.  In fact, only two points are needed to obtain any straight-line graph. In this section we will discuss two methods of sketching linear graphs whose rules are given.

 These methods are:  1. the gradient–intercept method and  2. the x- and y-intercept method.  Each of these methods also uses two points.

 We will now discuss three special cases of the linear rule;  where the y-intercept, c, = 0,  where the gradient, m, = 0  where the gradient is undefined.

 Your turn…  Complete - Questions 1 all All questions are to be answered in your math book!