Mathematics
Grade10
Easy
Question
If x and y vary inversely and x = 3 when y = 
, what is the value of y when x = -1 ?
- -2
- -
- -1
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: -2
Here, we have to find the value of y given that x and y are in inverse variation.
We have, y = k/x
=> = 
=>k = 2.
Now, y = 
= 
= 
= -2
Hence, the value of y is -2.
The correct option is B.
In inverse variation, xy = k for some constant k.
