The scatter plot shows the balance of a loan over the course of four years. Assuming the line of best fit for the given scatter plot is y=-311.75x+20,102, what was the approximate balance of the loan in 30 months?

Volume is length times width times height so
20 times 8 times 30 which is 4,800
surface area is ph (p is perimeter of base), h is height.
so perimeter would be length+length+width+width so 20+20+8+8 which is 56. so multiply 56 times 30 which is 1680. hope this !