Math Problem Statement

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Solve the following pairs of linear equations graphically: 6x - y + 4 = 0 and 2x - 5y = 8. Shade the region bounded by the lines and the y-axis.

Solution

The graphical solution for the system of linear equations 6xy+4=06x - y + 4 = 0 and 2x5y=82x - 5y = 8 is shown above. The region bounded by these lines and the y-axis is shaded in grey.

Steps to Interpret the Graph:

  1. Plotting the Lines:

    • The blue line represents the equation 6xy+4=06x - y + 4 = 0, which simplifies to y=6x+4y = 6x + 4.
    • The green line represents the equation 2x5y=82x - 5y = 8, which simplifies to y=2x85y = \frac{2x - 8}{5}.
  2. Intersection of Lines:

    • The two lines intersect at the point where their xx and yy values are equal. You can solve this algebraically or find it graphically where the two lines cross.
  3. Shaded Region:

    • The region bounded by the two lines and the y-axis is shaded. This area represents the solution set where the two inequalities intersect.

Would you like a detailed step-by-step solution on how to solve these equations algebraically? Or do you have any questions?

Here are some related questions to deepen your understanding:

  1. How would you solve the system of equations algebraically instead of graphically?
  2. What is the significance of the shaded region in this graph?
  3. How can you determine the intersection point algebraically?
  4. How would you describe the solution set if the system of equations had no intersection?
  5. Can these equations be rewritten to identify their slopes and intercepts easily?

Tip: When solving graphically, always ensure that your scales on both axes are equal to accurately interpret intersection points and regions.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

Slope-intercept form y = mx + b
Equation rearranging to solve for y: y = 6x + 4 and y = (2x - 8) / 5

Theorems

Intersection of two lines
Graphical method for solving linear systems

Suitable Grade Level

Grades 9-11