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Explain why slavery in the Mexican cession was very important to the north and
south?

The Mexican American War between the United States and Mexico from 1846 to 1848 One of the most important of proposals was the Wilmot Proviso which Neither party adopted a firm stance on slavery in the 1848 election; however, The Missouri Compromise stated that any territory north of the 36°30' parallel

Explanation:

THAT IS WHAT I THINK I AM NOT GOING TO SAY ITS RIGHT

image result for what are some causes and effects of pontiac's rebellion?

the colonists were also expected to pay a tax to meet the costs of establishing and manning the borders of the proclamation line which led to the belief that the king had sided with the indians despite pontiac's rebellion, against the interests of the settlers. this contributed to the causes of the american revolution.