Question

If x and y vary directly and x = 2, when y = 7, find y when x = 8.
​

Answer 1

Answer:

Step-by-step explanation:

y

=

28

Explanation:

“The variables  

x

=

2

and  

y

=

7

vary directly.”

We can express that as:

y

=

m

x

→

7

=

m

⋅

5

, where  

m

is the constant of variation (slope).

Now, we need to solve for  

m

:

7

=

2

m

Divide both sides by  

2

:

m

=

7

2

Now, we can plug this value, as well  

x

=

8

, into the next equation to find  

y

:

y

=

m

x

→

y

=

7

2

⋅

8

→

y

=

56

2

→

y

=

28

Answer 2

Answer:

28

Step-by-step explanation:

it

is

easy

you

do

.

ok

ok

Apne

se

bnao

na