Math Problem Statement

y = |2x − 10|

Solution

The equation y=2x10y = |2x - 10| represents the absolute value function. To better understand this function, we can break it down into two cases based on the definition of absolute value:

Case 1: When 2x1002x - 10 \geq 0

If the expression inside the absolute value is non-negative, the absolute value simply removes the absolute value bars: y=2x10y = 2x - 10 This occurs when: 2x100    x52x - 10 \geq 0 \implies x \geq 5 So, for x5x \geq 5, the function is y=2x10y = 2x - 10.

Case 2: When 2x10<02x - 10 < 0

If the expression inside the absolute value is negative, the absolute value changes the sign of the expression: y=(2x10)=2x+10y = -(2x - 10) = -2x + 10 This occurs when: 2x10<0    x<52x - 10 < 0 \implies x < 5 So, for x<5x < 5, the function is y=2x+10y = -2x + 10.

Summary of the piecewise function:

\begin{cases} 2x - 10 & \text{if } x \geq 5 \\ -2x + 10 & \text{if } x < 5 \end{cases}$$ The graph of this function is a V-shape with the vertex at $$(5, 0)$$, and the function is symmetric about the vertical line $$x = 5$$. Would you like a more detailed graph or further explanations? Here are 5 related questions for deeper exploration: 1. What is the slope of each piece of the function? 2. How do you find the vertex of an absolute value function? 3. Can you calculate the y-intercept of this function? 4. How would the function change if the absolute value were removed? 5. How does the function behave as $$x \to \infty$$ and $$x \to -\infty$$? **Tip**: The vertex of an absolute value function occurs where the expression inside the absolute value equals zero.

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Math Problem Analysis

Mathematical Concepts

Absolute Value
Piecewise Functions
Linear Equations

Formulas

y = |2x - 10|
y = 2x - 10 (for x ≥ 5)
y = -2x + 10 (for x < 5)

Theorems

Absolute Value Function Definition

Suitable Grade Level

Grades 9-11