Вопрос:

Determine the function graphed in the image.

Ответ:

Solution:

The image displays a piecewise function and its graph. We need to determine the function definitions for each part.

The function is defined as:

  • \( y = -\frac{1}{2}x + 3 \) for \( x \ge 2 \)
  • \( y = x - 1 \) for \( x < 2 \)

This can be represented as:

$$ y = \begin{cases} -\frac{1}{2}x + 3, & \text{if } x \ge 2 \\ x - 1, & \text{if } x < 2 \end{cases} $$

Let's verify the points on the graph:

  • For \( x = 2 \), the first part of the function gives \( y = -\frac{1}{2}(2) + 3 = -1 + 3 = 2 \). The point \( (2, 2) \) is plotted.
  • For \( x = 4 \), the first part gives \( y = -\frac{1}{2}(4) + 3 = -2 + 3 = 1 \). The point \( (4, 1) \) is plotted.
  • For \( x = 0 \), the second part gives \( y = 0 - 1 = -1 \). The point \( (0, -1) \) is plotted.
  • For \( x = 1 \), the second part gives \( y = 1 - 1 = 0 \). The point \( (1, 0) \) is plotted.

The tables provided also represent these functions:

xy
22
41
60
xy
0-1
10
21
32
43
54
65

The graph visually confirms the behavior of these two linear functions meeting at \( x=2 \).

Answer: The function is defined by \( y = -\frac{1}{2}x + 3 \) for \( x \ge 2 \) and \( y = x - 1 \) for \( x < 2 \).

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