Which function represents the graph y=3(1/2)^x ?


Function a



Function b



Function c



Function d

Verified Answer :

The answer Function B

Answer:

Option B.

Step-by-step explanation:

Consider the below figure attached with this question.

The given function is

\(y=3(\frac{1}{2})^x\)            .... (1)

We need to find the graph of given function.

The general form of an exponential function is

\(y=ab^x\)               .... (2)

where, a is initial value and b is growth or decay factor.

If 0<b<1, then it is a decreasing function.

If b>1, then it is an increasing function.

On comparing (1) and (2) we get

\(a=3, b=\frac{1}{2}\)

a=3, it means y-intercept of the function is 3.

\(b=\frac{1}{2}\), it means it is a decreasing function.

The table of values is

x          y

-2       12

-1        6

0        3

1       1.5

2       0.75

Plot these ordered pairs on a coordinate plane and connect then by a hand curve. Graph B represents the given function.

Therefore, the correct option is B.

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