Diane deposits $80,000 into an account that pays 4% interest per year, compounded annually. Henry deposits $80,000 into an account that also pays 4% per year. But it is simple interest.
Find the interest Diane and Henry earn during each of the first three years.
Then decide who earns more interest for each year.
Assume there are no withdrawals and no additional deposits.

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

after simplifying it i got: -36.25 as my answer. hope that !

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.