For Activities 19 and 20 a. For each labeled point, identify the graph near the p...

For Activities 19 and 20

a. For each labeled point, identify the graph near the point as concave up, concave down, or linear or as having a change of concavity at that point. Also indicate whether the tangent line at that point should lie above, lie below, or coincide with the graph on either side of the point.

b. At which of the labeled points is the slope of the tangent line positive? At which of the labeled points is the slope of the tangent line negative?

c. Draw tangent lines at the labeled points on the figure.