Question

X is directly proportional with y. Write an equation that shows the relationship if x=10 and y=4.

Answer 1

x=3

Step-by-step explanation:

⇒

y

=

3

x

Step-by-step explanation:

Direct proportionality is defined as:

y

=

α

x

where

α

is some constant that defines the proportionality.

Given

x

=

2

and

y

=

6

, we find:

y

=

α

x

6

=

α

(

2

)

3

=

α

So the relationship here is

y

=

3

x