How does the graph of $g(x)=\frac{1}{x+4}-6$ compare to the graph of the parent function $f(x)=\frac{1}{x}$?


A$g(x)$ is shifted 4 units right and 6 units up from $f(x)$.
B$g(x)$ is shifted 4 units right and 6 units down from $f(x)$.
C$g(x)$ is shifted 4 units left and 6 units up from $f(x)$.
D$g(x)$ is shifted 4 units left and 6 units down from $f(x)$.

Verified Answer :

  • Identify the transformation form \(y = f(x-h) + k\).
  • Determine the horizontal shift \(h\) from \(x+4\), which is \(-4\), indicating a shift of 4 units left.
  • Determine the vertical shift \(k\) from \(-6\), which is \(-6\), indicating a shift of 6 units down.
  • Conclude that the graph is shifted 4 units left and 6 units down: \(\boxed{\text{g(x) is shifted 4 units left and 6 units down from f(x)}}\).

Explanation

  1. Analysis of the Function Transformation

The parent function is given by \(f(x) = \frac{1}{x}\). The transformed function is given by \(g(x) = \frac{1}{x+4} - 6\). A general translation of a function \(f(x)\) is expressed as \(y = f(x - h) + k\), where \(h\) represents the horizontal shift and \(k\) represents the vertical shift. We will analyze the components \(x + 4\) and \(-6\) to determine how the graph of \(g(x)\) relates to the graph of \(f(x)\).

  1. Determining the Horizontal Shift

To determine the horizontal shift \(h\), we look at the argument of the function, which is \(x + 4\). Comparing this to the form \((x - h)\), we have \(x + 4 = x - (-4)\). This means that \(h = -4\). A horizontal shift of \(h = -4\) indicates that the graph is shifted \(4\) units to the left.

  1. Determining the Vertical Shift

To determine the vertical shift \(k\), we look at the constant term added to the function, which is \(-6\). Comparing this to the form \(f(x - h) + k\), we see that \(k = -6\). A vertical shift of \(k = -6\) indicates that the graph is shifted \(6\) units downwards.

  1. Conclusion and Final Answer

By combining these two transformations, we conclude that the graph of \(g(x) = \frac{1}{x+4} - 6\) is obtained by shifting the graph of \(f(x) = \frac{1}{x}\) by 4 units to the left and 6 units down. Therefore, the correct statement is that \(g(x)\) is shifted \(4\) units left and \(6\) units down from \(f(x)\). \(\boxed{\text{g(x) is shifted 4 units left and 6 units down from f(x)}}\).

Examples

Understanding how functions shift is essential in fields like physics and engineering. For example, if you are modeling the path of a projectile or the cooling curve of an object in a room, the parent function might describe a standard scenario (like an object cooling from 100 degrees in a room at 0 degrees). If you then change the environment—such as moving the object to a room at 20 degrees or shifting the timing of the experiment—you are applying these exact horizontal and vertical shifts to your mathematical model to accurately predict the new outcome.