I did 70 jumping jacks in 1 minute. Which is the dependent variable? Which is the independent variable?

Write an equation that represents the relationship between the time you spent doing the activity and the amount of the activity you completed.

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