Question

It is given that x varies directly as y.

Write an equation which relates x and y?

Find the constant of proportion when x is 6 and y is 8?

Find x, when y is 33?

Find y, when x is 8?

Answer 1

x:y=k (constant)

x:y=6:8

=3:4

a).3:4::x:33

4x=99

x=99/4

b)3:4::8:y

3y=32

y=32/3

Answer 2

Answer:

Step-by-step explanation:

x = ky. (1)

x = 6 , y = 8 put in (1) gives:

6 = 8k ---> k = 6 / 8 = 3 /4 --->

x = 3y/4.

y = 33 --- > x = 99 /4.

x = 8 ---> y = 32 / 3.