Would a state in the Oregon Territory be allowed to join as a slave state?

Yes

Explanation: Oregon Country's provisional government, which was led by Peter Burnett, a former slaver holder who came west from Missouri by wagon train, passed the law in 1844 — 15 years before Oregon became a state. The law allowed slave holders to keep their slaves for a maximum of three years.

the graphs indicate that few people in bolivia work in industry, as that is the least expressive sector shown in the respective graphic.