Mr. O'leary works as a cook at a pizzeria. Yesterday, he prepared 6 pizzas in 10 minutes. Today, he prepared 15 pizzas in 25 minutes.
Does the scenario represent a direct variation? Explain your reasoning.

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