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139.45
                                                         =
                                                              6
                                                         = 23.24

              Step 5:   Now we will assemble the equation of a line:
              y = mx + b
              y = 17.17x + 23.24
              Now you can use this equation to estimate the height of the child at 9 years.
              y = 17.17 (9) + 23.24 = 177.77 cm


                        At a Glance

                    •  A matrix (plural matrices) is a rectangular arrangement of numbers. The numbers are arranged in tabular
                     form as rows and columns.
                    •  A matrix having m rows and n columns is called a matrix of order m × n.
                    •  Matrices are used throughout the field of machine learning.
                    •  The determinant is a scalar value that is a function of the entries of a square matrix.
                    •  Matrix inversion is a process of finding another matrix that when multiplied with the original matrix, gives
                     an identity matrix.
                    •  Vectors are the basis of linear algebra. Vectors are used in the training of machine learning algorithms.
                    •  A vector is defined as a list of numbers in one-dimensional form.
                    •  A set is an unordered collection of objects, known as elements or members of the set.
                    •  A database is a collection of data.
                    •  Relational  algebra  consists  of  eight  operators:  SELECT,  PROJECT,  JOIN,  INTERSECT,  UNION,  DIFFERENCE,
                     PRODUCT, AND DIVIDE.
                    •  A JOIN is used to combine rows from two or more tables.
                    •  The mean is the average of all the values in a group of numbers.
                    •  The median is the middle value in a given list of numbers arranged in ascending or descending order.
                    •  The mode is the value that appears most often in a given list of numbers.
                    •  Variance measures the distance of each number in the data set from the mean.
                    •  Standard deviation is a statistic that measures the degree of dispersion of a data set relative to its average.
                    •  Complex and voluminous data, if expressed visually, is better processed by the human brain.
                    •  Linear regression shows the relationship between two variables by fitting a linear equation to the observed data.
                    •  The line of best-fit is the line that passes close to most of the data points.



                                                           Exercise




                                                       Solved Questions

                                                SECTION A (Objective Type Questions)
                        uiz

              A.   Tick ( ) the correct option.
                   1.   Which one of the following is a rectangular arrangement of numbers?
                       a.  Sets                                        b.  Matrix
                       c.  Vector                                      d.  Scalar




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