Question

Which is the best description of the graph of the function f(x) = 60(One-third)x? The graph has an initial value of 20, and each successive term is determined by subtracting One-third. The graph has an initial value of 20, and each successive term is determined by multiplying by One-third. The graph has an initial value of 60, and each successive term is determined by subtracting One-third. The graph has an initial value of 60, and each successive term is determined by multiplying by One-third.

Answer 1

Answer:

The graph has an initial value of 60, and each successive term is determined by multiplying by One-third.

Step-by-step explanation:

Which is the best description of the graph of the function f(x) = 60(One-third)x?

A. The graph has an initial value of 20, and each successive term is determined by subtracting One-third.

B. The graph has an initial value of 20, and each successive term is determined by multiplying by One-third.

C. The graph has an initial value of 60, and each successive term is determined by subtracting One-third.

D. The graph has an initial value of 60, and each successive term is determined by multiplying by One-third.

Given:

f(x) = 60 (1/3)^x         see graph attached.

Examining the graph, we notice that

1. The graph has an initial value of 60, at point (0,60)

2. The graph decreases as x increases.  Each successive term is determined by multiplying by 1/3, namely in the sequence

{(0,60), (1,20), (2, 20/3), (3, 20/9), ...}

This means the choice is D (or the fourth one).

Answer 2

Answer:

D

Step-by-step explanation:

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