Question

If x varies directly as y then complete the following table

Answer 1

Answer:

Here, x and y varies directly.

∴ x=yk

⇒

y

x

​

=k

Now, take x=5 and y=20

⇒

y

x

​

=k

⇒

20

5

​

=k

∴ k=

4

1

​

Now, For x=3 and y=a

a

3

​

=

4

1

​

⇒ a=4×3

∴ a=12

For x=9 and y=b

⇒

b

9

​

=

4

1

​

⇒ b=9×4

∴ b=36

⇒ a+b=12+36=48

∴ Value of a+b is 48.

Step-by-step explanation:

Hope it is helpful