Question

Find the variation constant and an equation of variation where y varies directly as x and y =2 when x=1

The variation constant is k=
The equation of variation is y=

Answer 1

y=kx so when y=2 and x=1 k=2 so k=2 and y=2x

Answer 2

ok

Answer 3

Since y and x are proportional, we can write y/x=k i.e. y=kx

Answer 4

k

Answer 5

?????

Answer 6

K is the proportionality constant

Answer 7

or as you have said variation constant

Answer 8

so what does k=?

Answer 9

k=2

Answer 10

y=?

Answer 11

Substitute y=2 and x=1 in the equation y=kx which will give you k=2

Answer 12

y=1

Answer 13

So after the substitution of k=2 in the equation y=kx, it becomes y=2x