Find the coordinates of the circumcenter of triangle d(2,3), e(8,3), f(8,-1)?

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

What is the rate for one gallon of gasoline

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