Question

Isaac keeps track of the amount of money in his savings certificate each month. He has accumulated the following data:

(0,50); (1,55); (2,60.5); (4,66.55)

What is the common difference or ratio?

a. The common difference is 0.48
b. The common difference is 0.50
c. The common ratio is 0.98
d. The common ratio is 1.1

Answer 1

d. The common ratio is 1.1

Explanation:

To see if the data has a common ratio or common difference, we have to see if the division between them is equal(common ratio), or if the difference between them is equal(common difference).

In this case, since
`60.5 - 55 \\eq 55 - 50`, it has a common ratio.

To find it, we divide consecutive terms. For example:

`(55)/(50) = 1.1`

So the correct answer is:

d. The common ratio is 1.1