A manufacturing plant eamed $80 per a man-hour of labor when it opened. Each year the plant earns an additional 6% per man-hour,
Which expression gives the amount the plant earned per a man-hour of labor 3 years after it opened?

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