Transformations
Given the curve of a given function y=f(x), you may be required to sketch transformations of the curve. Transformations can shift, stretch and flip the curve of a function.
y-transformations
A y-transformation affects the y coordinates of a curve. You can identify a y-transformation as changes are made outside the brackets of y=f(x).
, this is a shift in y, the x coordinates are unaffected but all the y coordinates go up by 4.
, this is a shift in y, the x coordinates are unaffected but all the y coordinates go down by 3.
, this is a stretch in y, the x coordinates are unaffected but all the y coordinates are doubled.
, this is a flip in y, the x coordinates are unaffected but all the y coordinates are flipped across the x-axis.
x-transformations
x-transformations always behave in the opposite way to what is expected. They can identified when changes are made inside the brackets of y=f(x).
, this is a shift in the x direction, the y coordinates are unaffected but all the x coordinates go to the left by 4, the opposite direction to what is expected.
, this is a shift in the x direction, the y coordinates are unaffected but all the x coordinates go to the right by 3, the opposite direction to what is expected.
, this is a stretch in the x direction, the y coordinates are unaffected but all the x coordinates are halved, the opposite to what is expected.
, this is a flip in the x direction, the y coordinates are unaffected but all the x coordinates are flipped across the y-axis.
See Curve Sketching for some more practice questions on Transformations.
Solomon Transformation Questions
SolomonTransformationQuestions
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