Question

For d(t) shown below, which of the following graphs is d ‘’(t)?

Answer 1

for these problems, recall that \(f''>0\) means positive curvature i.e. concave upward:

Answer 2

$$f''<0$$ means negative curvature i.e. concave downward

Answer 3

and \(f''=0\) means a point of inflection i.e. where the curve is locally uncurved