Question

Y is inversely proportional to x. If y= 400 when x =2 find y when x= 200

Answer 1

Answer: 4

Explanation:

Inversely proportional means xy = k, where k is the constant of proportionality

First, find k when x = 2 and y = 400 ----> 2(400) = k --> 800 = k

Then, find y when x = 200 (knowing that k = 800)

200y = 800

y = 4