Write an equation for the circle

Given:

The graph of a circle.

To find:

The equation of the given circle.

Solution:

The standard form of a circle is

         ...(i)

Where, (h,k) is vertex and r is the radius.

From the given graph it is clear that the radius of the circle is 4 units and the center of the circle is (-2,2).

Putting and in (i), we get

Therefore, the equation of the circle is .

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads