Question

P is inversely proportional to Q.

P= 10 when Q = 1.2

a) Work out the value of P when Q = 2.

b) Work out the value of Q when P = 1.25

Answer 1

P=6

Q= 9.6

Explanation:

A)

y=k/x

substitute it in.

10=k/1.2

10×1.2=k

k=12

y=12/x

x=2

12/2=6

P=6.

B)

Since we know y=kx

we know k=12

you would do 12/1.25 to give u Q

12/1.25=9.6

Answer 2

P = 10

Q=12

`p = (1)/(q)`

a). p = 1/2 = 0.5

b). 1.25 = 1/Q

Q = 1/1.25 Q = 0.8