Can someone help with number four? thanks.

What is the slope of the line shown below?

Which of the following is the graph of y= square root -x-3

Idon't want to fail summer school.the probabilities of contamination in medicine capsules due to the presence of heavy metals and different types of microbes are given in the table.the probability of capsule b having microbial contamination is (the same as, greater than, less than) the probability of capsule d having it.