Answer:
3.15 ..........
Step-by-step explanation:
Answer: 1.25
Step-by-step explanation:
The explicit formula for the sequence is 
Substituting in n=4,

Answer:
-3(22-d) ?
Step-by-step explanation:
I hope this is right please let me know
(-2,3) i believe this is correct
1.
(Create a table then plot the points)
X | 0 | 1 | 2 | 3 |
-------------------------
Y | -1 | 3 | 7 | 11 |
4 (0) -1 => 0 - 1 = -1
4 (1) -1 => 4 - 1 = 3
4 (2) -1 => 8 - 1 = 7
4 (3) -1 => 12 - 1 = 11
Just apply the table method to the others and you should be fine! :)