Is this table a function? PLEASE HELPPP

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Empty box + box + empty box fill in the box is equal to 30 how

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2