Question

AB contains the points A(7, -11) and B(8,17). find the slope of a line perpendicular to AB

A. Undefined
B.-1/28
C.1/28
D.28

Answer 1

If a line were to be perpendicular from said points, the slope of it would be -1/28. Hope this helps!

Answer 2

perpendiculare lines have slopes that multiply to -1

find slope
given (x1,y1) and (x2,y2) the slope would be (y2-y1)/(x2-x1)
so

given
(7,-11) and (8,17)
slope=(17-(-11))/(8-7)=(17+11)/1=28

28 times what=-1
divide by 24
what=-1/28

slope is -1/28

answer is B