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What is the effect on the graph of [tex]\( f(x)=x^2 \)[/tex] when it is transformed to [tex]\( h(x)=\frac{1}{6} x^2 - 9 \)[/tex]?

A. The graph of [tex]\( f(x) \)[/tex] is horizontally compressed by a factor of 6 and shifted 9 units down.
B. The graph of [tex]\( f(x) \)[/tex] is vertically compressed by a factor of 6 and shifted 9 units to the right.
C. The graph of [tex]\( f(x) \)[/tex] is vertically compressed by a factor of 6 and shifted 9 units down.
D. The graph of [tex]\( f(x) \)[/tex] is horizontally stretched by a factor of 6 and shifted 9 units to the right.


Sagot :

Let's analyze the transformation of the function [tex]\( f(x) = x^2 \)[/tex] to [tex]\( h(x) = \frac{1}{6} x^2 - 9 \)[/tex].

### Step-by-Step Analysis:

1. Identify the Original Function:
The original function is [tex]\( f(x) = x^2 \)[/tex].

2. Vertical Compression:
The term [tex]\(\frac{1}{6} x^2\)[/tex] indicates that the graph is vertically compressed by a factor.
Vertical compression by a factor [tex]\(a\)[/tex] means scaling the original function's y-values by [tex]\(a\)[/tex]. Here, [tex]\(a = \frac{1}{6}\)[/tex].
This means that every y-value of the original function [tex]\( f(x) = x^2 \)[/tex] is multiplied by [tex]\(\frac{1}{6}\)[/tex].

3. Vertical Shift:
The term [tex]\(- 9\)[/tex] indicates a vertical shift.
A vertical shift down by 9 units means translating every y-value of the compressed function downward by 9 units.

Thus, the transformation [tex]\( f(x) \rightarrow h(x) = \frac{1}{6} x^2 - 9 \)[/tex] can be summarized as follows:
- The graph of [tex]\( f(x) = x^2 \)[/tex] is vertically compressed by a factor of 6 (since [tex]\(\frac{1}{6}\)[/tex] is the fraction by which it is compressed).
- The graph is then shifted down by 9 units.

### Conclusion:
After considering the vertical compression and vertical shift, the correct description of the transformation that has occurred is:

C. The graph of [tex]\( f(x) \)[/tex] is vertically compressed by a factor of 6 and shifted 9 units down.