Question

he points shown on the graph represent the numbers in a geometric sequence.

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

What is the initial value of the sequence?

1
2
3
8

Answer 1

The y-values are the sequence terms: a1 = 2, a2 = 4, a3 = 8. This is geometric with ratio 2, so the initial (first) value is 2.