?
y varies directly as (x + 3) and y = 8 when x = 1. What is the value of y when x = 2 ?
Answer & Solution
Correct Answer:
Option
B
y α (x + 3)
⇒ y = k (x + 3) for some constant k.
When y = 8, x = 1, y = k (x + 3)
⇒ 8 = k (1 + 3)
⇒ k = 2
When x = 2, y = 2(x + 3) = 2(2 + 3) = 2 × 5 = 10
⇒ y = k (x + 3) for some constant k.
When y = 8, x = 1, y = k (x + 3)
⇒ 8 = k (1 + 3)
⇒ k = 2
When x = 2, y = 2(x + 3) = 2(2 + 3) = 2 × 5 = 10
Join the Discussion
Login to post a comment or share your explanation.
Login