Question 15
Variationy varies directly as w2. When y = 8, w = 2, find y when w = 3.
- A.6
- B.18
- C.12
- D.9
Show the answer and explanation
Answer: B (18)
Explanation
y = kw2; 8 = 4k gives k = 2. When w = 3, y = 2 × 9 = 18.
y varies directly as w2. When y = 8, w = 2, find y when w = 3.
Answer: B (18)
y = kw2; 8 = 4k gives k = 2. When w = 3, y = 2 × 9 = 18.