Identify vertical stretches and compressions by analyzing transformations outside f(x)
Apply the counteraction principle: forcing y to multiply causes division of y-coordinates
Calculate new y-coordinates by multiplying or dividing based on the stretch factor
Recognize that vertical transformations are measured relative to the x-axis
Distinguish between coefficients inside versus outside the function notation
What You'll Practice
1
Graphing functions with vertical stretch factors like 1/2, 4/3, and 3
2
Plotting transformed points by applying stretch factors to y-coordinates only
3
Verifying stretched graphs by calculating specific coordinate values
4
Comparing heights of original and transformed parabolas
Why This Matters
Vertical stretches are essential for modeling real-world phenomena where quantities scale up or downlike amplifying sound waves, adjusting spring constants in physics, or analyzing exponential growth rates. Mastering this transformation prepares you for advanced functions in precalculus and calculus.