~Determine whether each sequence is arithmetic or geometric fund the next three terms~

Question

*Doing a math unit test and stuck on these five*
1.14,19,24,29....

2.-2,8,-16,32...

3.81,27,9,3...

4.What are the first four terms of an arithmetric sequence if the common diffrence is 1.5 and the first term is 15

5.What are the first four terms of a geometric sequence if the common ratio is 10 an the first term is 4.5

Answer 1

if the difference is constant, it's arithmetic. If the ratio is constant, it's geometric.

#1 is clearly arithmetic
#2 is geometric
#3 is too

#4 15 + 1.5 + 1.5 ...
#5 4.5 * 10 * 10 ...

Answer 2

Thanks:)

Answer 3

Lesson 3: Functions
Algebra Readiness (Pre-Algebra) B Unit 1: Functions

1. D
2. A
3. B
4. A
5. B
6. C
7. D
8. A

Written Response:
9.
Equation to see if its arithmetic:
.8-1.6 = -.8
.4-.8 = -.4 , so no it is not arithmetic

Equation to see if its geometric:
.8/1.6 = .5
.4/.8 = .5
.2/.4 = .5 , so yes the sequence is geometric

My answer is that this sequence is geometric because as you can see from above when tested, it did not turn out as arithmetic. So, then I tested to see if the sequence was geometric, and it turned out right. Meaning the answer could not be neither nor arithmetic. SO it is geometric.
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BUT AS FOR NOW, THESE ANSWERS WILL GET YOU A 9/9 100%
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Answer 4

I know this was a different test I just wanted to spread this answer across Jiskha because nobody had post the whole quiz yet.

I'm just being nice.