<span>x+2 = -x+6
</span>2x+2 = 6
2x = 4
x = 2
I don’t see a number line, but whatever says that the stock had no increase or decrease is your best bet.
Explanation: we can see it does have a decrease, but the increase the next day overrides it and turns the stock addition to $0
(8,12)(14,3)
Use midpoint formula
(X1+x2/2, y1+y2/2)
Substitute with your points
(8+14/2, 12+3/2)
Solve each
(22/2,15/2)
Cancel common factor 2
(2×(4+7)/2(1),15/2)
Simplify
(4+7/1,15/2)
This is your midpoint
(11, 15/2)
