Question

Which answer is the explicit rule for the sequence: 15.5,  13,  10.5, 8,  5.5,  3, ...

http://prntscr.com/dflsis

Answer 1

What is the first term of this sequence?

Answer 2

15.5?

Answer 3

I think it's A, now looking at it.

Answer 4

Yes, correct.
I want you to say it with a full of mouth!

\(\Huge 15.5\)

Answer 5

Is it A?

Answer 6

Step by step, please

Answer 7

Sorry.
Kinda rushing.

Answer 8

Is it decreasing or increasing?

Answer 9

Decreasing?

Answer 10

Correct!
so \(15.5-..?..=13\)

Answer 11

2?

Answer 12

2.5, sorry

Answer 13

Yes, the index is (-2.25)
again: \(13- ..?.. =10.5\)

Answer 14

2.5

Answer 15

That is right! and so on...
SO the repeated subtracted number is 2.25, and the sequence is decreasing, then what would be the most match from the choices?

Answer 16

A.

Answer 17

Why A?
Is the first term 15.5 or 18?