A linear equation is represented as a line graph. In order to draw the line graph we require several pairs of coordinates. These coordinates represent the relationship given in the equation.

It begins by reviewing statistical graphs and then explains the relationship between variables such as distance and time through equations. The film demonstrates how to plot ordered pairs on ...

As the tangent is a straight line, the equation ... circle and the tangent at the point P (3, -4) and draw the radius from the centre (0, 0) to the point P. The gradient of the radius is given ...