Write the system of linear equations that is represented by the given augmented matrix. Assume that the variables are x, and x,. 6 2 4 1 53 Let x, represent the variable for the first column and x, represent the variable for the second column. The equation that represents the first row is . The equation that represents the second row is (Type equations using x, and x2 as the variables. Type your answers in standard form.)

3. Find a quadratic function whose graph contains the points (1, -1), (3, 13), (5, 51). Write and solve a system of 3 linear equations in 3 variables, a, b, and c. Check by using the regression feature on the graphing calculator. Point Substitution Equation