Applications of matrices include finding the area of a triangle, finding points, solving linear equations and cryptography of data. A matrix is simply a group of numbers, so its applications in the world of mathematics are widely variable.
Know MoreThe area of a triangle is calculated using a determinant, a type of matrix with three rows and columns representing the x and y coordinates of a triangle. The matrix is evaluated for the area. Collinear points can be found using matrices in the same way. The area, however, will evaluate to zero, which means it is a line rather than a triangle.
Cramer's Rule solves a system of equations using matrices. A coefficient matrix is created from the constants in each equation. Data encryption and decryption, or cryptography, also involves matrices and the conversion of a message into units using a key, which makes the interpretation of the message difficult for outsiders.
Learn more about Data GraphsRows and columns are used to describe the arrangement of sets of data or objects in space, but the difference between these two terms lies is the orientation of the objects. A row has the objects arranged horizontally, and a column has the objects arranged vertically.
Full Answer >A foreign key is a column (or group of columns) in a relational database table that provides a link between data in two tables. A foreign key in one table corresponds to a primary key in another table.
Full Answer >A stem-and-leaf plot is a method for visualizing data in which the tens digits of the data points are written in a column and the ones digits are written in rows next to them. The tens digits form the stem, and the ones digits are the leaves.
Full Answer >To make a pie chart, organize the data as fractions of the whole. Multiply each fraction by 360 degrees, which is the number of degrees in a circle, and assign each multiplied fraction a portion of the pie chart.
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