Find the slope of the line perpendicular to the line y = x - 7	Choose the correct choice from the following answers:
A) 1
B) 2
C) -1
D) 4
E) 5
Two lines are perpendicular if the product of their slopes is equal to -1. The slope of the given line is equal to 1. If m is the slope of the line perpendicular to the given line, then   m × 1 = -1   Solve for m   m = - 1   correct answer -1) -1
<result>C</result>
Find the slope of the line perpendicular to the line y = x - 7