Plsss help explain I have an exam later and I need to understand this

Answer:
Option C
Step-by-step explanation:
The formula for calculating the slope of 2 points is [tex]\frac{y^{2-}y^{1} }{x^{2}-x^{1} }[/tex]
(-9, -10) and (-2, -5)
Slope = [tex]\frac{-5-(-10)}{-2-(-9)} =\frac{5}{7}[/tex]