What is the constant of proportionality in the equation y = 7x?

The constant of proportionality in the equation is 7.

Step-by-step explanation:

Given : The equation

To find : What is the constant of proportionality in the equation ?

Solution :

The general form of constant of proportionality is

where, k is the constant of proportionality.

On comparison with general form,

here, k=7

Therefore, the constant of proportionality in the equation is 7.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

30

step-by-step explanation:

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