Whats the solution to this? easy math problem.

(note i put the graph in so plz )the graph shows the amount of water that remains in a barrel after it begins to leak. the variable x represents the number of days that have passed since the barrel was filled, and y represents the number of gallons of water that remain in the barrel. what is the slope of the line

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

Which of the functions graphed below has a removable discontinuity?