Question

If y varies directly with x and y=7 and when x=56, then find.

the constant of variation k

Answer 1

y varies directly with x means y = kx
where k is proportionality constant

Answer 2

so here
y=7 & x =56

substitute the value of y & x in the equation
\[\Large y =kx\]

can you find it ?

Answer 3

@rebecca1233 can you?

Answer 4

so i times ?

Answer 5

392?

Answer 6

\[\Large y=kx\]\[7= k \times 56\]to find k we divide both sides by 56
What do you get now?

Answer 7

0.125

Answer 8

Right :)

Answer 9

so thats the answer ?

Answer 10

Yeah
7/56=1/8=0.125

Answer 11

thank you can you help me with a few more please

Answer 12

Will try :)

Answer 13

If y varies directly with x and y=7 and when x=56, then find.


the value of when x=4

Answer 14

So its the same question
y varies directly with x
so what will be the equation ?

Answer 15

7/4?

Answer 16

x=ky

Answer 17

Nope ,

y varies directly with x
so
y=kx

if its x varies directly with y it will be x=ky

understood ?

Answer 18

yes

Answer 19

y = kx
7=k*56
k=7/56 =1/8

Answer 20

For these type of questions ,First step is to find the value of k
ok?

Answer 21

ok

Answer 22

So now we have k =1/8 (or 0.125)

consider the same equation
y=k*x
here x = 4 & k =0.125

so what is y = ?

Answer 23

u divide right ?

Answer 24

y = k* x
which all values you have ?

Answer 25

ok tell me what are we trying to find ..?

Answer 26

idk it says the value of when x=4

Answer 27

you probably read the question wrong ,it will be ' the value of y when x=4"

Answer 28

so we are finding y here

Answer 29

not on my paper it doesnt say y or anything

Answer 30

it might be printing mistake

" the value of when x=4 " doesn't make any sense

Answer 31

do you have the answer ?

Answer 32

hno

Answer 33

how do you do this

Answer 34

give the equation of the line