Geometric Sequences — Cumulative exam

Question 1

What is the common ratio of the sequence?-2, 6, -18, 54,...

Revolt · Accepted Answer

−3

Question 2

Which table represents exponential growth?

Revolt · Accepted Answer

A 2-column table has 4 rows. The first column is labeled x with entries 1, 2, 3, 4. The second column is labeled y with entries 2, 4, 8, 16.

Question 3

On a coordinate plane, 2 curves are shown. The first curve f (x) opens up and to the right in quadrant 1. It goes through (4, 2), (1, 4), and crosses the y-axis at (0, 5). The second curve g (x) opens down and to the right and goes through (4, negative 2), (1, negative 4), and crosses the y-axis at (0, negative 5).

Revolt · Accepted Answer

g(x) = –5(0.8)x

Question 4

On a coordinate plane, an exponential function approached y = 0 in quadrant 2 and increases into quadrant 1. It crosses the x-axis at (0, 2).

Revolt · Accepted Answer

2

Question 5

Yui makes a list of the balances in her savings account at the end of each month. She notices that each month’s total is 5% greater than the previous month’s total. She writes a recursive formula to describe the account balances.

Revolt · Accepted Answer

1.05

Geometric Sequences — Cumulative exam Answers

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