From what I saw on google for what "one to one" means, It's basically meaning that the bottom of that quadratic function is at point (0 , 0) and hits both (-1 , 1) and (1 , 1) on the graph.
(a) The rate that the point 8,28 represents is 3.5 cm/s since 28/8 = 3.5 (b) The unit rate is 3.5 cm/s since the rate is constant. (c) The two points lie on the same line and that both points results to a rate of 3.5 cm/s.<span />
