What is the slope between the points (3,1) and (4,-1)

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

2x minus y equals 6, x plus y equals negative 3