the answer is f(x)=2x-1
i think the answer is b)
answer:rotation and dilationtranslation and dilation
rotation, translation, and reflection are all rigid transformations that will result in congruent figures. dilation (by a factor other than 1) will result in a figure of the same shape, but not of the same size, so the image is similar, but not congruent, to the original.
the applicable choices are those that include dilation.