Mathematics
Grade10
Easy
Question
Given that y varies inversely with x, if x = 7 and y = 4, what is y when x = 2 ?
- 14
- 10
- 2
- -14
Hint:
Mathematical relationship between two variables which can be expressed by an equation in which the product of two variables is equal to a constant.
The correct answer is: 14
Here, x varies inversely to y.
we have, y = k/x
=>4 = 
=>k = 28.
And, y = 
= 
= 14.
Hence, the correct option is C.
In inverse variation x1y1 = x2y2.
