PreCalc Functions Help: Translations

In summary, the three types of translations in precalculus functions are horizontal translations, vertical translations, and reflections. The direction of the translation is determined by the sign of the value added or subtracted in the function. Translations can affect the domain and range of a function, but not its shape. To graph a translated function, you can use the properties of translations to determine the new coordinates of the points on the graph.
  • #1
eddie2113
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Q: The point (0,-1/2) is on the graph of f. If g is a translation of f so that g(x)=f(x+1/2) + 2, then what are the coordinates of the translated point?

I got the answer (-1/2, 2) but I'm not sure if that is the correct answer.
Thanks!
 
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  • #2
Re: PreCalc Functions Help

The translation:

\(\displaystyle f(x-h)+k\)

takes the point $(x,y)$ on $f$, and moves it to $(x+h,y+k)$.

You have the correct new $x$-coordinate, but not the correct new $y$-coordinate.
 

Related to PreCalc Functions Help: Translations

1. What are the different types of translations in precalculus functions?

The three types of translations in precalculus functions are horizontal translations, vertical translations, and reflections. Horizontal translations occur when the entire graph is shifted either left or right on the x-axis. Vertical translations occur when the entire graph is shifted up or down on the y-axis. Reflections occur when the graph is flipped across either the x-axis or the y-axis.

2. How do I know which direction to shift the graph for a translation?

The direction of the translation depends on the sign of the value added or subtracted in the function. If the value is positive, the graph will shift in the positive direction (right or up). If the value is negative, the graph will shift in the negative direction (left or down).

3. Can translations affect the domain and range of a function?

Yes, translations can affect the domain and range of a function. Horizontal translations can change the domain of a function, while vertical translations can change the range of a function. It is important to consider these changes when analyzing the behavior of a function after a translation.

4. Can translations affect the shape of a function?

No, translations do not affect the shape of a function. The shape of a function remains the same after a translation, only its position on the coordinate plane changes. The shape of a function is determined by its equation, not by translations.

5. How do I graph a translated function?

To graph a translated function, you can use the properties of translations to determine the new coordinates of the points on the graph. For example, if you are shifting a function 3 units to the right, you would add 3 to the x-coordinates of each point. Once you have the new coordinates, you can plot them on the coordinate plane and connect them to create the translated graph.

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