Exponential Decay Functions — Cumulative exam Answers

Which table shows exponential decay?

Which is the graph of f(x) = (4)x?

Which equation represents an exponential function with an initial value of 500?

Which is equivalent to ?

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.

Which graph is the sequence defined by the function f(x) = 3(2)x-1?

Which is the graph of ?

When simplified, the expression is 12. Which is a possible value of x?

On a coordinate plane, an exponential function decreases from quadrant 2 into quadrant 1 and approaches y = 0. It crosses the y-axis at (0, 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).

A 2-column table has 5 rows. The first column is labeled x with entries negative 2, negative 1, 0, 1, 2. The second column is labeled f (x) with entries one-eighth, one-fourth, one-half, 1, 2.

The curve through the ordered pairs (0, 10), (1, 5), and (2, 2.5) can be represented by the function f(x) = 10(0.5)x. What is the multiplicative rate of change of the function?

The table represents an exponential function.

What is the simplified value of the exponential expression ?

On a coordinate plane, an exponential function approaches y = 0 in quadrant 2 and increases into quadrant 1. It goes through (negative 1, 0.25), (0, 0.5), (1, 1).

Which table represents exponential growth?

1.2, 3, 7.5, 18.75, ...

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

Which is a stretch of an exponential decay function?

Which is equivalent to ?