1. 2x² – 5x - 3
I am not sure how to solve

X= 3, -1/2

Step-by-step explanation:

Solve by factoring

2x^2 - 5x - 3

2x^2 - 6x + X - 3

2x(x - 3) +1 (x-3)

(x-3)(2x+1)

X = 3, -1/2

you need a common difference between consecutive terms to be constant, like 1,2,3,4 or 2,4,6,8, or 1,3,6,9

last one.

step-by-step explanation:

last one.

generally speaking, the others follow some sort of pattern that correlates to either linear (looks like a straight line) or sinusoidal (looks like an s).

the last one is just a random cloud of points that doesn't correlate to any particular known order.