Let's analyze the function \( P = 0.15|d| + 25 \) to understand its key features.
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Type of Function:
- This function is not a decreasing function; rather, it is an increasing function because as the absolute distance \( |d| \) increases, the term \( 0.15|d| \) increases, leading to a higher value of \( P \).
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Vertex:
- The vertex of this function is indeed at the point \( (0, 25) \). This indicates that when an employee travels 0 miles to the worksite, the additional pay they receive is $25. This is the minimum additional pay since any distance traveled (positive or negative) would only increase the amount of pay.
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Domain:
- The domain of this function is all real numbers, \( d \in \mathbb{R} \). It can take both negative and positive values representing distances traveled either towards or away from the worksite.
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Range:
- The range of the function \( P \) starts from 25 and goes to infinity, so \( P \geq 25 \). The additional pay will never be negative; it will always be at least $25.
Based on this analysis, the following response accurately reflects the key features of the function:
- "There is a vertex at (0, 25) which indicates that when an employee travels 0 miles to the work site, the amount of additional pay is $25."
This statement correctly identifies the vertex and its implication regarding the additional pay.
The other options provided are incorrect for the reasons mentioned above.