Math Problem Statement

what is the system of equation

What is the system of equations?

Solution

The image shows two functions: a blue parabola and a red straight line. To identify the system of equations, I will analyze the key characteristics of both graphs.

  1. Parabola (blue graph):

    • The parabola opens downwards, suggesting it has a negative leading coefficient.
    • The vertex appears to be at (0,2)(0, 2).
    • The parabola crosses the x-axis near x=3x = -3 and x=3x = 3, which could be roots.
    • A possible equation for this parabola is in the form:
      y=a(xh)2+ky = a(x - h)^2 + k where (h,k)(h, k) is the vertex. Here, (h,k)=(0,2)(h, k) = (0, 2), so the equation might be: y=a(x0)2+2=ax2+2y = a(x - 0)^2 + 2 = ax^2 + 2 Given that the parabola opens downwards, aa is negative. Using approximate values for the x-intercepts at x=3x = -3 and x=3x = 3, we can estimate: y=29x2+2y = -\frac{2}{9}x^2 + 2 as the equation of the parabola.
  2. Line (red graph):

    • The line has a positive slope and crosses the y-axis around y=1y = -1.
    • It crosses the x-axis at approximately x=1.5x = -1.5 and the y-axis at y=1y = -1.
    • Using the slope-intercept form y=mx+by = mx + b, where bb is the y-intercept and mm is the slope, we estimate the slope mm as: m=3(1)40=44=1m = \frac{3 - (-1)}{4 - 0} = \frac{4}{4} = 1 So, the line equation is approximately: y=x1y = x - 1

System of equations:

y = -\frac{2}{9}x^2 + 2 \\ y = x - 1 \end{cases}$$ This is the system of equations represented by the graphs. Let me know if you'd like a detailed solution for the points of intersection or further clarifications. ### Relative questions: 1. How do you find the points of intersection between the two equations? 2. What other methods can be used to estimate the vertex of a parabola? 3. How do we solve the system of equations algebraically? 4. How does changing the slope of the line affect its intersection with the parabola? 5. Can we generalize the system for any line and parabola with different orientations? **Tip:** When solving systems of equations involving quadratics and lines, graphing can provide quick insights into the number and location of solutions.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Functions
Linear Functions
Systems of Equations
Graphing

Formulas

y = ax^2 + bx + c
y = mx + b

Theorems

Slope-Intercept Form
Vertex Form of a Parabola

Suitable Grade Level

Grades 9-12