Mr. Mole left his burrow that lies 777 meters below the ground and started digging his way deeper into the ground, descending at a constant rate. After 666 minutes, he was 161616 meters below the ground. Let yyy represent Mr. Mole's altitude (in meters) relative to the ground after xxx minutes.
Complete the equation for the relationship between the altitude and number of minutes.

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