Answer:
b and d are relative minimums (minima)
Explanation:
An "absolute" minimum is the very lowest point on a graph. This graph doesn't have an "absolute" minimum because the end points both go to negative infinity (they go down forever)
But, this graph DOES have points that are "relative" minimums, which means the points are the minimum (lowest) in their neighborhood. In the immediate vicinity of the point, it is the lowest point.
In case there are further questions with this graph:
relative max: a and c
absolute max: f
x-intercepts: a,c,e,g
probably a 6th degree function,
multiplicity 2 at a and c
multiplicity 1 at e, g
leading coeffient is negative.