A shoe store for men sells an average of 40 pairs of shoes per day when the price is $50 per pair. When 60 pairs of shoes are sold per day, the average price per pair is
$40. By using the midpoint method, the absolute value of the price elasticity of
demand is

127 millimeters is the answer

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0 

C. y = -3, the line lies on the y-axis and is on -3