Question

What is the common ratio of the following sequence?

-5, -20, -80, ...
A. -4
B. 1/4
C. 4

Answer 1

`\text{Hello there!}\\\\\text{We're trying to find the common ratio}\\\text{The common ratio is the number that the sequence is changing by}\\\\\text{To find the common ratio, we need to find how much the sequence is}\\\text{changing by}\\\\\text{From -5 to -20, we know that it's multiplying by 4}\\\\\text{From -20 to -80, it's multiplying by 4}\\\\\text{Therefore, our common ratio is 4}\\\\\large\boxed{\text{Answer: C.\,\,4}}`

Answer 2

the answer is “c. 4” because each interval is being multiplied by 4