Z Varies Jointly With X And Y If X =3, Y=8 And Z=6, Find The Variation Equation Then, Find Z When X=

z varies jointly with x and y if x =3, y=8 and z=6, find the variation equation then, find z when x=2 and y=10

 

Answer:

The function is

z

=

2

x

y

. When

x

=

6

and

y

=

4

,

z

=

48

.

Explanation:

We know that the function has the form

z

=

k

x

y

, so

k

=

z

x

y

.

If

x

=

7

,

y

=

2

, and

z

=

28

,

k

=

28

7

×

2

=

28

14

=

2

.

So

z

=

2

x

y

If

x

=

6

and

y

=

4

,

z

=

2

×

6

×

4

=

48