Question

Sketch the graph of the function using a window that gives a complete graph.
​f(x)equalsleft brace Start 2 By 2 Matrix 1st Row 1st Column 5 2nd Column if x greater than or equals 0 2nd Row 1st Column negative 5 2nd Column if x less than 0 EndMatrix

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Part 1
Choose the correct graph below.
A.
-10
10
-10
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A coordinate system has a horizontal axis labeled from negative 10 to 10 in increments of 2 and a vertical axis labeled from negative 10 to 10 in increments of 2. A graph has two branches. The first branch is a horizontal ray that startes at the closed point (0, negative 5) and moves to the left, passing through the point (negative 10, negative 5). The second branch is a horizontal ray that starts the open point (0, 5) and moves to the right, passing through the point (10, 5).
B.
-10
10
-10
10



A coordinate system has a horizontal axis labeled from negative 10 to 10 in increments of 2 and a vertical axis labeled from negative 10 to 10 in increments of 2. A graph has two branches. The first branch is a horizontal ray that startes at the open point (0, negative 5) and moves to the left, passing through the point (negative 10, negative 5). The second branch is a horizontal ray that starts the closed point (0, 5) and moves to the right, passing through the point (10, 5).
C.
-10
10
-10
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A coordinate system has a horizontal axis labeled from negative 10 to 10 in increments of 2 and a vertical axis labeled from negative 10 to 10 in increments of 2. A graph has two branches. The first branch is a horizontal ray that startes at the closed point (0, negative 5) and moves to the right, passing through the point (10, negative 5). The second branch is a horizontal ray that starts the open point (0, 5) and moves to the left, passing through the point (negative 10, 5).
D.
-10
10
-10
10

Answer 1

To sketch and analyze the function described, we note that it’s a piecewise function defined as follows:

- \( f(x) = 5 \) for \( x \geq 0 \)
- \( f(x) = -5 \) for \( x < 0 \)

### Breaking Down the Function

1. **For \( x \geq 0 \)**:
- The function takes the value \( 5 \).
- The graph includes the point (0, 5), which is a closed point (meaning this value is included).
- The graph extends to the right (positive x-axis) indefinitely at \( y = 5 \).

2. **For \( x < 0 \)**:
- The function takes the value \( -5 \).
- The graph does not include \( (0, -5) \) which is an open point at \( x = 0 \).
- The graph extends to the left (negative x-axis) indefinitely at \( y = -5 \).

### Sketching the Graph

- We will have:
- A horizontal line at \( y = 5 \) starting from \( (0, 5) \) and extending to the right.
- A horizontal line at \( y = -5 \) starting from \( (0, -5) \) extending to the left.

### Analyzing Provided Options

Now let's analyze which option corresponds to our understanding:

1. **Option A**: The graph has a horizontal ray starting at (0, -5) to the left (which is incorrect, it should be at (0, 5)).
2. **Option B**: The graph has a horizontal ray starting at the open point (0, -5) to the left (which is incorrect, it should be at (0, 5)).
3. **Option C**: The graph has a horizontal ray starting at the closed point (0, -5) moving to the right (which is incorrect, it should be at (0, 5)).
4. **Option D**: The graph has a horizontal ray starting at the closed point (0, 5) moving to the right, which matches our findings and gives the correct representation of the function for \( x \geq 0 \) and a line at \( y = -5 \) extending to the left without including the point (0, -5).

Therefore, the correct option is:

**D**.