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How does the graph of [tex]g(x)=3^x-2[/tex] compare to the graph of [tex]f(x)=3^x[/tex]?

A. The graph of [tex]g(x)[/tex] is a translation of [tex]f(x)[/tex] 2 units left.
B. The graph of [tex]g(x)[/tex] is a translation of [tex]f(x)[/tex] 2 units right.
C. The graph of [tex]g(x)[/tex] is a translation of [tex]f(x)[/tex] 2 units up.
D. The graph of [tex]g(x)[/tex] is a translation of [tex]f(x)[/tex] 2 units down.


Sagot :

To understand how the graph of [tex]\( g(x) = 3^x - 2 \)[/tex] compares to the graph of [tex]\( f(x) = 3^x \)[/tex], we need to analyze the relationship between these two functions.

### Step-by-Step Solution:

1. Identify the Parent Function:
The parent function here is [tex]\( f(x) = 3^x \)[/tex].

2. Understand the Transformation:
The function [tex]\( g(x) \)[/tex] can be expressed as:
[tex]\[ g(x) = 3^x - 2 \][/tex]
This shows that [tex]\( g(x) \)[/tex] is derived from [tex]\( f(x) \)[/tex] with an adjustment.

3. Determine the Nature of the Transformation:
The expression [tex]\( 3^x - 2 \)[/tex] indicates a translation. Specifically, we are subtracting 2 from the output of [tex]\( 3^x \)[/tex].

4. Vertical Translation:
Subtracting 2 from a function [tex]\( f(x) \)[/tex] results in a vertical shift. More precisely, for any value of [tex]\( 3^x \)[/tex]:
[tex]\[ g(x) = 3^x - 2 \][/tex]
This shifts every point on the graph of [tex]\( f(x) = 3^x \)[/tex] down by 2 units.

Therefore, the graph of [tex]\( g(x) = 3^x - 2 \)[/tex] is a vertical translation of the graph of [tex]\( f(x) = 3^x \)[/tex] down by 2 units.

### Conclusion:
The correct description from the given options is:

The graph of [tex]\( g(x) \)[/tex] is a translation of [tex]\( f(x) 2 \)[/tex] units down.