ABSTRACT
In engineering, the straight line graph is the most basic graph to draw and evaluate. A graph can be used to represent almost any physical situation involving discrete objects and the relationship among them. A graph is a pictorial representation of information showing how one quantity varies with another related quantity. This chapter aims to determine the gradient of a straight line graph and the vertical-axis intercept. The co-ordinates are plotted and joined for each graph. The points on a graph are called co-ordinates. The horizontal distance of a point from the vertical axis is called the abscissa and the vertical distance from the horizontal axis is called the ordinate. When the co-ordinates are plotted a straight line is drawn between the two points. Graphs have a wide range of applications in engineering and in physical sciences because of their inherent simplicity.
