(2,-1) The intersecting point is the point where the two lines meet.
Y2 -y 1 / x2 - x1
6 - 4 / -1 - 2
2 / - 3
m = -2/3 x (slope)
Mean of the low is approximately 47.7 Median of the low is 45 and 50 or 47.5
You should purchase from the store that is selling the 2/$5. You spend less money per item. The A store has you pay $2.50 per item with the deal while the B store has you pay almost $6 per item.