Answer:
The answer is, A. it is constant
Step-by-step explanation:
Between the x values 4 and 8 the line does not decrease or increase. It stays in a straight line causing it to be constant.
Answer:
0.8746 = 87.46% probability of at least 6 failures in 7 trials.
Step-by-step explanation:
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
7 trials
This means that 
The probability of success in any trial is 9%?
So the probability of a failure is 100 - 9 = 91%, which means that 
Probability of at least 6 failures in 7 trials?
This is:

In which




0.8746 = 87.46% probability of at least 6 failures in 7 trials.
I don't think anyone can read that, sorry!