Unit Test — Unit test Answers

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).

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.

What is the simplified value of the exponential expression ?

Which table represents exponential growth?

The function f(x) = 2·5x can be used to represent the curve through the points (1, 10), (2, 50), and (3, 250). What is the multiplicative rate of change of the function?

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

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?

Which is equivalent to ?

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

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

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.

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

1.2, 3, 7.5, 18.75, ...

Which table shows exponential decay?

The table represents an exponential function.

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).

Which is equivalent to ?

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).