McGraw Hill Integrated II, 2012
MH
McGraw Hill Integrated II, 2012 View details
Mid-Chapter Quiz
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Exercise 18 Page 132

Start with a vertical translation.

Transformations: Translation six units down
Graph:

We want to describe how to transform the parent function f(x)=x^2 to the graph of the given quadratic function. g(x)=x^2-6 To do so, we need to consider four possible transformations.
  1. Reflections
  2. Stretches and compressions
  3. Horizontal translations
  4. Vertical translations

Notice that we only need to consider the fourth transformation.

Vertical Translation

If an addition or subtraction is applied to the whole function, the graph will be vertically translated. In the case of addition, the graph will be translated up. In the case of subtraction, it will be moved downwards. In the given equation, 6 is subtracted from the whole function, so the parent function graph will be translated six units down.

Final Graph

Let's now graph the given function and the parent function f(x)=x^2 on the same coordinate grid.

Finally, let's summarize how to draw the graph of the given function when starting with the parent function, f(x)=x^2.

  • Translation six units down