Math Problem Statement

Use the draggable points to graph y=−2|x−3|+5

Solution

To graph the equation y=2x3+5y = -2|x - 3| + 5, you should follow these steps:

  1. Understand the structure of the equation:

    • y=x3y = |x - 3| represents the basic absolute value function, which is a V-shaped graph with the vertex at (3,0)(3, 0).
    • The factor of 2-2 reflects and stretches the graph vertically by a factor of 2, making the V open downward and steeper.
    • The +5+5 at the end shifts the entire graph up by 5 units.
  2. Determine the vertex: The vertex of the graph is at (3,5)(3, 5), because the equation is of the form y=2x3+5y = -2|x - 3| + 5.

  3. Plot key points:

    • For x=3x = 3, y=5y = 5, so plot the point (3,5)(3, 5).
    • For x=4x = 4, calculate y=243+5=2(1)+5=3y = -2|4 - 3| + 5 = -2(1) + 5 = 3, so plot (4,3)(4, 3).
    • For x=2x = 2, calculate y=223+5=2(1)+5=3y = -2|2 - 3| + 5 = -2(1) + 5 = 3, so plot (2,3)(2, 3).
    • As xx moves further away from 3, the absolute value term increases, and the graph continues downward with a slope of 2-2 to the left and right of the vertex.
  4. Sketch the V-shape: The graph should form a V with the vertex at (3,5)(3, 5), opening downwards and stretching steeper due to the factor of 2-2.

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Math Problem Analysis

Mathematical Concepts

Graphing Absolute Value Functions
Transformations of Functions

Formulas

y = -2|x - 3| + 5

Theorems

Vertex Form of Absolute Value Functions
Reflection and Stretching of Graphs

Suitable Grade Level

Grades 8-10