Math Problem Statement

HW 5 PIECEWISE-DEFINE FUNCTION: The graph represents a piecewise-defined function with different behaviors over specific intervals of x. The goal is to identify the correct piecewise function representation.

Solution

The image shows a piecewise-defined function question involving a graph. To determine the correct piecewise function, we must analyze the behavior of the graph in different intervals of xx.

Analysis of the Graph:

  1. First Interval (-3 ≤ x < 1):

    • The line starts at x=3x = -3, y=4y = -4 and ends at x=1x = 1, y=0y = 0.
    • The slope of this line is 0(4)1(3)=44=1\frac{0 - (-4)}{1 - (-3)} = \frac{4}{4} = 1, indicating the equation of the line is f(x)=x1f(x) = x - 1.
  2. Second Interval (2 < x ≤ 4):

    • This segment starts at x=2x = 2, y=3y = 3 and ends at x=4x = 4, y=3y = -3.
    • The slope of this line is 3342=62=3\frac{-3 - 3}{4 - 2} = \frac{-6}{2} = -3, and using the point-slope form, the equation is f(x)=3x+9f(x) = -3x + 9.

Piecewise Function:

  • For 3x<1-3 \leq x < 1, the equation is f(x)=x1f(x) = x - 1.
  • For 2<x42 < x \leq 4, the equation is f(x)=3x+9f(x) = -3x + 9.

This matches option B.

Conclusion:

The correct answer is B.


Would you like further explanation or have any other questions?

Here are 5 related questions:

  1. How is the slope calculated between two points?
  2. What is the point-slope form of a linear equation?
  3. How do you determine the equation of a line from a graph?
  4. What does it mean for a function to be piecewise-defined?
  5. How can you check continuity for a piecewise function?

Tip: Always check for open and closed intervals when dealing with piecewise functions to avoid domain conflicts.

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Math Problem Analysis

Mathematical Concepts

Piecewise Functions
Linear Equations
Slope of a Line

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)
Equation of a line: y = mx + b
Point-slope form: y - y1 = m(x - x1)

Theorems

Equation of a straight line theorem
Continuity of piecewise functions

Suitable Grade Level

Grades 9-11