Pretty sure this is correct
The point-slope form:

We have the points (-8, -8) and (-7, 9). Substitute to the formula of a slope:

Put the coordinates of the point (-7, 9) and the value of slope to the point-slope formula:

The pattern here is the number times 3 then plus 1
We can check this by plugging it in.
1×3=3
3+1=4
4 is the next number in our sequence so the pattern works.
We can continue to check this with the rest of our sequence.
4×3=12
12+1=13
13 is the next number in our sequence so the pattern works.
13×3=39
39+1=40
40 is the next number in our sequence so the pattern works.
40×3=120
120+1=121
121 is the next number in our sequence so the pattern works.
We can find the next numbed in the sequence by continuing the patter
121×3=363
363+1=364
So the next number in the sequence is 364
I think it is the second one
The slope is 2, because there is $20 difference
I hope this helps :)
If you have any questions about my answer please feel free to ask:)
Answer:
It's an equilateral triangle.
My justification..... it looks like it