Which of the sets of ordered pairs represents a function? A = {(2, 7), (1, −5), (7, 2), (2, −9)}

B = {(5, 3), (−2, −9), (−3, 8), (9, 3)}

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap