Lets find the mean ofthe data (2,1,2,4,5,4 together)

(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

Select the correct answer and solve for y

What are the solutions of the following system? y=-2x^2 y=x-2