Posted by caduceus on .
What is the slope of the line that is perpendicular to the line represented by the equation below?
4x  5y = 1
A. 4/5
B. 4/5
C. 5/4
D. 5/4
is this c or d? reiny, i used what you said, but since this is subtraction i was unsure of whether or not it would be negative or not.

algebra 
Damon,
5 y = 4 x + 1
so
y = (4/5) x + 1/5
slope = 4/5
so slope of perpendicular = 5/4