kind of but not really the way you want.
* you can always create a custom calculated field that would be placed on your issue/request and indicate from there whether it is "resolved" vs "not resolved"
* the only way to do this without a calculated field would be to group by the resolving object type, and this would create a pie chart with a number of slices. For example, in my instance, we resolve by converting to task and projects, so I have 3 slices, one for "task", one for "proj" and one for "no value" (the not-resolved slice)
(the grouping for object type is:
group.0.valuefield=resolvingObjCode
group.0.valueformat=HTML
)