Question

On a map, Sandusky St. passes through coordinates (2, -1) and (4, 8). Pennsylvania Ave. intersects Sandusky St. and passes through coordinates (1,3) and (6,2). Are these streets perpendicular? Explain.

Answer 1

find the slope of each line using:

(Y2-y1) / (x2-x1),

two lines will be perpendicular if their slope is the opposite reciprocal

so like m=2 and m=-1/2

http://www.purplemath.com/modules/slope2.htm

Answer 2

The streets are not perpendicular unfortunately.