Suppose that y varies directly with x, and y=12 when x= 15. .
(a) Write a direct variation equation that relates
x and y
8
Equation:
х
(b) Find y when x = 2
y =

Step-by-step explanation:

Find  

k

:

−

8

=

k

(

−

2

)

k

=

−

8

−

2

=

4

y

=

4

x

Find  

x

when  

y

=

32

:

32

=

4

x

x

=

32

4

=

8

CHECK using another method where you don't need to find  

k

:

y

1

y

2

=

x

1

x

2

−

8

32

=

−

2

x

2

Use the cross-product to find  

x

2

,  

x

when  

y

=

32

:

−

8

x

2

=

−

2

(

32

)

−

8

x

2

=

−

64

x

2

=

−

64

−

8

=

8

b i think

step-by-step explanation:

not really sure

pretty sure 750 each month!

step-by-step explanation: