The slope of the line is 
First, you must find 2 points.
(-6,8) (-2,5)
Then, you must substitute the value of the points in.

Finally, simplify the fraction.

To answer this question, you would need a protractor, which is a device that measures angle. Because this is a picture, I cannot help you. I'm sorry....
What I can tell you is that the angle is less than 90 degrees.
60 miles in total.
to find percentages, you divide the part by the whole, so 33/60 = .55, which you then move the decimal over two places and read as a percentage