the height of a child increases at the rate of (52.5,58.7,65,70.2,75.4,81.1,87.2,9 5.5,102.2,108.4 ) consecutively for ten months, fix the straight line using the method of least square and calculate the average increase and the standard error of estimate​

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