Math Problem Statement

Escribir un sistema de ecuaciones lineales para el siguiente gráfico.

Solution

The task asks to write a system of linear equations based on the provided graph. By analyzing the graph:

  1. Identify the two lines and their slopes (m) and y-intercepts (b). Each line follows the equation y=mx+by = mx + b, where mm is the slope and bb is the y-intercept.
  2. The equations can be derived by observing the intersections with axes or by calculating the slope.

Let me analyze this for you:

  • Line 1 (steeper positive slope): The line appears to pass through key points like (0,3)(0, 3) (the y-intercept) and (3,0)(3, 0). Using these:

    • Slope m=ΔyΔx=3003=1m = \frac{\Delta y}{\Delta x} = \frac{3 - 0}{0 - 3} = -1.
    • Equation: y=x+3y = -x + 3.
  • Line 2 (negative slope): This line seems to pass through points like (0,2)(0, -2) (y-intercept) and (4,0)(-4, 0).

    • Slope m=ΔyΔx=200(4)=12m = \frac{\Delta y}{\Delta x} = \frac{-2 - 0}{0 - (-4)} = -\frac{1}{2}.
    • Equation: y=12x2y = -\frac{1}{2}x - 2.

System of Equations:

y = -x + 3 \\ y = -\frac{1}{2}x - 2 \end{cases}$$ If you would like, I can explain the calculations in more detail or assist further. Let me know! --- **Questions to Explore:** 1. How can you confirm the intersection point of the two lines algebraically? 2. How would the system change if one of the lines was shifted upward? 3. What does the intersection point of the lines represent in a real-world context? 4. How can these equations be used in a word problem scenario? 5. What tools or methods can graphically verify the accuracy of the equations? **Tip:** Always double-check the slope and y-intercept from the graph by carefully identifying the points used.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form
Graphing

Formulas

y = mx + b

Theorems

Slope-Intercept Relationship

Suitable Grade Level

Grades 8-10