You are looking at a map with a scale of 1 inch = 20 miles. If two towns are separated on the map by 6 inches, the actual distance between them is -6 miles
-120 miles
-120 inches

120 miles! 6 (inches) x 20 (miles per inch) = 120, and it is of course miles, not inches, so:

-120 miles

120 miles

Step-by-step explanation:

If there is 6 inches and each inch represents 20 miles, then we multiply 6 and 20 to get 120 miles between each town.

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.