Question

If x,y are in inverse proportion then complete the following table x= 42 y=-15 , x=30 y=-----

​

Answer 1

when x=30, y = -21

Explanation:

x = k/y

x = 42 y = -15

x = k/y

42 = k/-15

Cross product

42 * -15 = k

-630 = k

k = - 630

Find y when x=30

x = k/y

30 = -630/y

Cross product

30 * y = - 630

30y = - 630

y = - 630/30

y = -21

when x=30, y = -21