What is the prime factorization of 30

In the diagram of circle a what is m

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)