Which of the following equations is an example of inverse variation between variables x and y?

a. y = x + 7
b. y = 7x
c. y = x/7
d. y = 7/x

D.

Step-by-step explanation:

Let y varies inversely with x.

Then we can write the variation equation:

We introduce the constant of proportionality, k and obtain the inverse variation equation:

From the given options, the only equation in this form is

In this case, k=7 is the constant of proportionality or constant of variation.

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.