Question

ch graph represents a geometric sequence?

On a coordinate plane, 5 points are plotted. The points are (1, 1), (2, 3), (3, 5), (4, 7), (5, 9).
On a coordinate plane, 4 points are plotted. The points are (1, 1), (2, 2), (3, 4), (4, 8).
On a coordinate plane, 3 points are plotted. The points are (1, 2), (4, 4), (9, 6).
On a coordinate plane, 3 points are plotted. The points are (1, 1), (2, 4), (3, 9).

Answer 1

The second one: (1,1), (2,2), (3,4), (4,8).

Reason: the y-values are 1, 2, 4, 8 — each term is multiplied by 2 to get the next (common ratio 2), so it's geometric.
The others are not geometric: (1,3,5,7,9) is arithmetic, (1,4,9) are squares (not constant ratio), and (2,4,6) from the third set (with irregular x-steps) is not geometric.