Which net folds into the pyramid?

choices are on the 2nd picture with letter

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

Which one ? is the answer and how to find this answer

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders