Transformations can really change how a polynomial function looks on a graph. Understanding these changes helps us see functions in a new light!
- Vertical Shifts:
When you add or subtract a number from a polynomial, like turning f(x) into f(x)+k, you are shifting the graph up or down.
- If k is positive, the graph moves up.
- If k is negative, the graph moves down.
Imagine moving the whole graph up or down without changing its shape!
- Horizontal Shifts:
If you change the input by a number, like turning f(x) into f(x−h), the graph shifts left or right.
- A positive h moves the graph to the right.
- A negative h moves it to the left.
- Stretching and Compressing:
When you multiply the function by a number, like changing f(x) to af(x):
- If ∣a∣>1, the graph stretches vertically, making it taller.
- If 0<∣a∣<1, it compresses, making the graph look squished.
It’s all about how "tall" or "squished" the graph appears!
- Reflection:
Sometimes, the graph can flip depending on the sign you multiply with.
For example, changing f(x) to −f(x) flips the graph over the x-axis.
These transformations help us change and explore polynomial functions in so many exciting ways!