Math Problem Statement

Solve the system of linear equations by graphing: y = x + 4, x + y = 6.

Solution

The problem is to solve the system of linear equations by graphing. For the given problem (number 6):

The system of equations is:

  1. y=x+4y = x + 4
  2. x+y=6x + y = 6

Steps to Solve by Graphing:

  1. Rewrite both equations in slope-intercept form (y=mx+by = mx + b) if necessary.

    • Equation 1 is already in slope-intercept form: y=x+4y = x + 4.
    • For Equation 2: x+y=6x + y = 6 y=x+6y = -x + 6
  2. Graph each equation:

    • For y=x+4y = x + 4:

      • Slope (mm) = 1, y-intercept (bb) = 4.
      • Plot the y-intercept (0, 4).
      • Use the slope to find another point (1 unit up, 1 unit right). Second point: (1, 5).
    • For y=x+6y = -x + 6:

      • Slope (mm) = -1, y-intercept (bb) = 6.
      • Plot the y-intercept (0, 6).
      • Use the slope to find another point (1 unit down, 1 unit right). Second point: (1, 5).
  3. Find the point of intersection:

    • Both lines pass through the point (1, 5).
    • Therefore, the solution to the system is (1,5)\boxed{(1, 5)}.

Would you like me to graph this for visualization? Let me know! 😊

Related Questions:

  1. How can you verify the solution of a system of equations algebraically?
  2. What does it mean when the lines in a system of equations are parallel?
  3. How can you solve a system of equations using substitution instead of graphing?
  4. How do slope and y-intercept determine the behavior of a line?
  5. What is the significance of the point of intersection in real-world problems?

Tip:

Always check the accuracy of your graph by plugging the intersection point into both equations to verify the solution!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

Slope-intercept form y = mx + b

Theorems

Intersection of two lines in a coordinate plane

Suitable Grade Level

Grades 8-10