A study prepared for National Association of Realtors estimates that the number of housing starts in the southwest, N(t) (in units of a million), over the next 5 years is related to the mortgage rate r(t) (percent per year) by the equation + r = 36, where t is measured in years. What is the rate of change of the number of housing starts with respect to time when the mortgage rate is 11% per year and is increasing at the rate of 1.5% per year?

Which is a graph of a proportional relationship?

In a column proof the right column states your reasons

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