Identify Intervals on Which the Function Is Increasing, Decreasing, or Constant

question 161

Multiple Choice

Identify intervals on which the function is increasing, decreasing, or constant.
- $$h ( x ) = | x + 4 | + | x - 8 | - 9$$

• A) Increasing: \(( 4 , \infty )\); decreasing: \(( - \infty , 8 )\); constant: \(( 4,8 )\)
• B) Increasing: \(( 8 , \infty )\); decreasing: \(( - \infty , - 4 )\); constant: \(( - 4,8 )\)
• C) Increasing: \(( 9 , \infty )\); decreasing: \(( - \infty , 4 )\); constant: \(( 4,9 )\)
• D) Increasing: \(( - \infty , - 4 )\); decreasing: \(( 8 , \infty )\); constant: \(( - 4,8 )\)

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