Answer:
Step-by-step explanation:
Set up the slope formula to solve for the unknown:
[tex]\frac{6-s}{-7-(-4)}=-5[/tex] which simplifies to
[tex]\frac{6-s}{-7+4}=-5[/tex] which simplifies a bit more to
[tex]\frac{6-s}{-3}=-5[/tex] Multiply both sides by -3 to get rid of the fraction, leaving you with:
6 - s = 15 and
-s = 9 so
s = -9