Question

if a is directly proportional to b and when a= 4, b = 2 then if a = 8 then b=?​

Answer 1

Answer:

4

Step-by-step explanation:

It can be written as

4:2::8:b

4/2=8/b

by cross multiplication

4b=8×2

4b = 16

b = 16÷4

b = 4

Answer 2

Answer:

a=4

B=2

a=8

B=4

we multiplied 2 with 2 because 4×2 is 8

Step-by-step explanation:

Look for the Gravitational formula

then directly proportional means when the 1st object or numerical increase the other increases as well.