When x varies inversely with y then you'll have
xα1/y
x=k/y where k is the proportionality constant
when x=8. y=10. k=?
8=k/10
make k the subject of the formula
k=10×8
k=80.
When x=6. y=?.k=80
6=80/y
Make y the subject of the formula
y=80/6
y=40/3
We can Add/Subtract 7 to the x-value or y-value of the point.
(10, 6)
(10 - 7, 6)
(3, 6)
(10 + 7, 6)
(17, 6)
(10, 6 - 7)
(10, -1)
(10, 6 + 7)
(10, 13)
The only point in the options is (3, 6).
1. 16, the ones with fruits
2. 87, with the cars
