Correlation is a term that is a measure of the strength of a linear relationship between two quantitative variables (e.g., height, weight). This is when one variable increases while the other increases and visa versa. For example, positive correlation may be that the more you exercise, the more calories you will burn.

Bar graphs are best used to compare values across categories. A pie chart is a circular chart used to compare parts of the whole. It is divided into sectors that are equal in size to the quantity represented.

bar chart

A scatterplot is a type of data display that shows the relationship between two numerical variables. Each member of the dataset gets plotted as a point whose ( x , y ) (x, y) (x,y)left parenthesis, x, comma, y, right parenthesis coordinates relates to its values for the two variables.

A negative correlation where the values of variables move in opposite directions. A plot of paired data points on an x- and a y-axis, used to visually represent a correlation.

Graphic method the method of scientific analysis or investigation, in which the relations or laws involved in tabular numbers are represented to the eye by means of curves or other figures; as the daily changes of weather by means of curves, the abscissas of which represent the hours of the day, and the ordinates the …

Graphical methods are quick and easy to use and make visual sense. Calculations can be done with little or no special software needed. Visual test of model (i.e., how well the points line up) is an additional benefit.

Graphical method of linear programming is used to solve problems by finding the highest or lowest point of intersection between the objective function line and the feasible region on a graph.

The graphical method is applicable to solve the LPP involving two decision variables x1, and x2, we usually take these decision variables as x, y instead of x1, x2. To solve an LP, the graphical method includes two major steps. a) The determination of the solution space that defines the feasible solution.