How do turn a math problem into a real world problem?

Aline that intersects one of two parallel lines intersects the other also always sometimes never

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

What is the point slope form of a line with slope -5 that contains point (2,-1)