Math Problem Statement

Solve the system of equations by graphing: y = 2x - 4 and y = x.

Solution

From the uploaded image, I can identify that the task involves solving a system of equations by graphing. The given system of equations is:

  1. y=2x4y = 2x - 4
  2. y=xy = x

Steps to Solve:

  1. Graph the first equation (y=2x4y = 2x - 4):

    • This is a straight line with a slope of 2 and a y-intercept of -4.
    • Plot the point (0,4)(0, -4) (the y-intercept).
    • Use the slope 22 (rise over run) to find additional points. For every 1 unit increase in xx, yy increases by 2.
  2. Graph the second equation (y=xy = x):

    • This is a straight line with a slope of 1 and a y-intercept of 0.
    • Plot the point (0,0)(0, 0).
    • Use the slope 11 to find additional points. For every 1 unit increase in xx, yy also increases by 1.
  3. Find the point of intersection:

    • The solution to the system is where the two lines intersect.
    • Observing the graph in the image, the lines intersect at (4,4)(4, 4).

Solution:

The solution to the system of equations is (4,4)\mathbf{(4, 4)}.

Would you like further details or assistance?
Here are 5 related questions for exploration:

  1. How do you verify the solution of a system of equations algebraically?
  2. What are the differences between solving a system graphically, algebraically, or using substitution?
  3. How can you determine if a system has no solution or infinitely many solutions?
  4. What happens when the slopes of the two lines in a system are equal?
  5. How do you write the equations of lines in slope-intercept form if given two points?

Tip: Always label the axes and key points on your graph to ensure clarity in your solution!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Systems of Equations
Graphing

Formulas

y = mx + b (Slope-Intercept Form)

Theorems

The Intersection of Two Lines Represents the Solution to the System

Suitable Grade Level

Grade 8-9