Question

figure b is a transformation of figure a.
how can you describe the transformation?
slide
flip
turn

Explanation:

Step1: Analyze the transformation

If it were a slide (translation), the figure would just move without flipping or turning. If it were a flip (reflection), there would be a mirror - like image. For a turn (rotation), the orientation of the figure changes.
Looking at figure A and B, if we consider a vertical line (say the y - axis between them as an axis of symmetry), figure B is a mirror - image of figure A.

Answer:

Flip