Question 45
Measures of DispersionIf x > 0, find the range of the numbers x − 3, 3x + 2, x − 1, 4x, 2x − 1, x − 2, 2x − 2, 3x and 3x + 1.
- A.3x + 3
- B.3x + 1
- C.2x + 5
- D.2x + 1
Show the answer and explanation
Answer: A (3x + 3)
Explanation
For x > 0 the largest is 4x and the smallest is x − 3, so the range is 4x − (x − 3) = 3x + 3.