How can you determine whether the data in a table represents a proportional relationship? *

You invested $5000 between two accounts paying 4% and 9% annual interest, respectively. if the total interest earned for theyear was $350, how much was invested at each rate? $was invested at 4% andwas invested at 9%.

How to do this , and can some one explain

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)