Area of a triangle with a base of 10in and altitude to the base of 16in

Hello :
Area of a triangle is A = (b×h)/2
 b =10in  and h =16in
A= (10×16)/2 = 80 in²

By visually assessing we can eliminate the other choices until we have the ff: 

(–1, –1), (0, 0), (1, 1), (2, 8)(–1, 1), (0, 0), (1, 1), (2, 4)
Well, it's definitely not the second set of points.  Exponential functions are monotonic (either always increasing, or decreasing).  In the second set, the function has decreased from (-1,1) to (0,0), and then increased from (0,0) to (1,1).