Abstract
The basic theory of graphs as a method of showing pictorially how the value of one variable quantity varies with the value of another was considered in First-year Technician Mathematics. In that book graphs of simple linear equations were plotted and a graphical method of solution of simultaneous linear equations was demonstrated. In this chapter we shall be extending the method to solve quadratic equations and simultaneous equations, both quadratic and linear. In addition we shall be examining the further use of the straight-line graph as a means of solving problems involving non-linear equations.
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