Please answer correctly, thanks!

What does the sign of the slope tell you about a line?

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.