691 Linear Equations in Two Variables Section 10.2 Objective 1: Definition of a Linear Equation in Two Variables For Exercises 9-17, determine whether the given ordered pair is a solution to the equation. (See Example 1.) 1 +3; (-3,4) 9. x -y 6; (8, 2) 10. y 3x - 2; (1, 1) 11. y = 5 +5; 12. y 13. 4x+ 5y 20; (-5, -4) 14. y 7; (0, 7) (-2, 0) 17. x =-5; (-5, 6) 15. y-2; (-2, 6) 16. x 1; (0, 1) Objective 2:Graphing Linear Equations in Two Variables by Plotting Points For Exercises 18-31, complete each table and graph the corresponding ordered pairs. Draw the line defined by the points to represent all solutions to the equation. (See Examples 2-4.) 18. x+ y 3 19. x + y =-2 y X y 3 2 2 21 1 1 1 0 5-4-3-2-1 1 2 34 5 1 2 3 45 -5-4-3-2-1 -1 -3 2 MN 2 3

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Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.