Column a the slope of the line through the points (12,-4) and (2,-10) column b the slope of the line through the points (-4,6) and 10,18)

Can someone me with this problem . show your work .

Is a positive integer raised to a negative power always positive

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.