The image shows a handwritten page of a mathematics textbook with the topic of "changing the value of a". The image shows a graph in the top left corner that is a straight line with the equation y = x. Below the graph, there is a table with two functions, f(x) = 2x and g(x) = 3x. The table has rows for different values of x. The coordinates provided, -26.584, 28.082, place the location in Meyerton, South Africa.