The following table shows the number of lemons that grew on Mary's lemon tree each season.
Season Number of lemons
Winter 333
Spring 151515
Summer 212121
Fall 131313

The following relation is not a function

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