Math Problem Statement

Write a piecewise function for the graph shown below, and choose the correct answer from the provided options.

Solution

The graph shown in the image is made of two distinct linear segments. Based on the points and slopes, we can write the piecewise function for it.

  • The first part of the graph goes from point (5,2)(-5, 2) to the origin (0,0)(0, 0), which suggests a linear segment for x<0x < 0.

    • The slope mm of this line can be calculated using the two points:
      m=020(5)=25m = \frac{0 - 2}{0 - (-5)} = \frac{-2}{5} The line has a slope of 25-\frac{2}{5} and passes through (0,0)(0, 0), so the equation of the line is:
      y=25xy = -\frac{2}{5}x
  • The second part starts at (0,0)(0, 0) and extends to (2,1)(2, 1), for x0x \geq 0.

    • The slope of this line is:
      m=1020=12m = \frac{1 - 0}{2 - 0} = \frac{1}{2} This line also passes through (0,0)(0, 0), and its equation is: y=12xy = \frac{1}{2}x

Thus, the piecewise function can be written as:

-\frac{2}{5}x & \text{for } x < 0 \\ \frac{1}{2}x & \text{for } x \geq 0 \end{cases}$$ Now, looking at the options in the image, none of them seem to match exactly what we've derived, but the closest option in structure should reflect a change in slope for $$x < 0$$ and $$x \geq 0$$. You might need to check for approximation, but if I were to pick the closest answer based on structure alone, I would say **option B** looks similar. Would you like more details or have any questions? --- ### Related Questions: 1. How do you calculate the slope of a line between two points? 2. What is the general form of a piecewise function? 3. How does the slope affect the steepness of a line? 4. How would the function change if the lines had different y-intercepts? 5. Can you rewrite the piecewise function if the lines were not continuous? **Tip**: In a piecewise function, it's important to ensure that each piece covers the correct domain (i.e., the range of $$x$$ values where each line is valid).

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Math Problem Analysis

Mathematical Concepts

Piecewise Functions
Linear Equations
Slope
Graphing

Formulas

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

Theorems

Slope-Intercept Form
Piecewise Function Representation

Suitable Grade Level

Grades 9-11