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Most linear equations are functions (that is, for every value of x, there is only one corresponding value of y). When you assign a value to the independent variable, x, you can compute the value of the dependent variable, y. You can then plot the points named by each (x,y) pair on a coordinate grid.
Check this solution in the original. equations. Using a Graphing Calculator. Use a matrix equation and a graphing calculator to solve the linear system. 2x+ 3y+z= Âº1 Equation 1. 3x+ 3y+ z= 1 Equation 2. 2x+ 4y+ z= Âº2 Equation 3. SOLUTION. The matrix equation that represents the system is = . Using a graphing calculator, you can solve the system as shown.