Question

X ∝ 1/y and when x = 100 then y = 0.4. If x = 8, find y.

Answer 1

Answer:

0.5

Step-by-step explanation:

as

x inversely proportional to y

xy=constant

therefore

x1y1=x2y2

$100 \times 0.4 = 8 \times y2 \\ y2 = \frac{100 \times 0.4}{8} \\ y2 = \frac{4}{8} \\ y2 = \frac{1}{2} \\ y2 = 0.5$