What is the constant of proportionality in the equation StartFraction x over y EndFraction StartFraction 2 over 9 EndFraction? StartFraction 2 over 9 EndFraction
2
StartFraction 9 over 2 EndFraction
9

Given:

The equation is:

To find:

The constant of proportionality.

Solution:

If y is directly proportional to x, then

                       ...(i)

Where, k is the constant of proportionality.

We have,

On cross multiplication, we get

Divide both sides by 2.

Interchange the sides.

               ...(ii)

On comparing (i) and (ii), we get

The constant of proportionality is . Therefore, the correct option is B.

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation: