Math Problem Statement

Solve the system of equations by graphing: 1. y = -2x - 3 2. y = (x + 3)^2 + 4 Identify the solutions by finding the points of intersection on the graph.

Solution

The problem involves solving the system of equations by graphing, as shown in the uploaded image:

  1. y=2x3y = -2x - 3 (a linear equation)
  2. y=(x+3)2+4y = (x + 3)^2 + 4 (a quadratic equation)

Step-by-Step Solution:

  1. Graph the Linear Equation y=2x3y = -2x - 3:

    • This is a straight line with slope 2-2 and y-intercept 3-3.
    • Two points on this line are:
      • At x=0x = 0, y=3y = -3.
      • At x=1x = 1, y=5y = -5.
    • Plot these points and draw the straight line passing through them.
  2. Graph the Quadratic Equation y=(x+3)2+4y = (x + 3)^2 + 4:

    • This is a parabola with its vertex at (3,4)(-3, 4).
    • At x=2x = -2 and x=4x = -4, y=5y = 5 (symmetric points around the vertex).
    • At x=1x = -1 and x=5x = -5, y=8y = 8.
    • Plot these points and draw the parabola.
  3. Find Intersection Points:

    • The graph shows the two curves intersecting at approximately:
      • x=4x = -4, y=6y = 6
      • x=1.5x = -1.5, y=0y = 0

These intersection points represent the solutions to the system of equations.

Solutions:

The solutions are:

  • (4,6)(-4, 6)
  • (1.5,0)(-1.5, 0)

Would you like a detailed explanation of graphing, intersections, or solving algebraically?

Related Questions:

  1. How do you find the intersection of two equations algebraically?
  2. What are some tips for identifying the vertex of a parabola?
  3. How does the slope of a line affect its steepness and direction?
  4. How can symmetry help when plotting a parabola?
  5. What are alternative methods for solving systems of equations (besides graphing)?

Tip:

When graphing systems of equations, always verify intersection points by substituting them back into both equations.

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Math Problem Analysis

Mathematical Concepts

Graphing linear equations
Graphing quadratic equations
Intersection of graphs

Formulas

y = mx + b (equation of a line)
y = (x - h)^2 + k (vertex form of a parabola)

Theorems

Intersection points of graphs correspond to solutions of the equations

Suitable Grade Level

Grades 9-10