Question

Line r passes through points (8,10) and (2,3). Line s is perpendicular to r. What is the slope of line S?

Answer 1

Answer:

               $-\dfrac67$

Step-by-step explanation:

slope of r:

                  $a_r=\dfrac{10-3}{8-2}=\dfrac76$

s is perpendicular to r:

$s\perp r\ \ \implies\ \ a_s\cdot a_r=-1\\\\a_s\cdot\dfrac76=-1\\\\a_s=-\dfrac67$