Formula to find slope :
[tex]\boxed {\boxed {\text {Slope = } \dfrac{Y_2-Y_1}{X_2-X_1} }}[/tex]
Given that that the two coordinates are (3,8) and (1,3):
[tex]\text {Slope = } \dfrac{8-3}{3-1} = \dfrac{5}{2} [/tex]
[tex]\boxed {\boxed {\text {Answer: Slope = }\dfrac{5}{2}}}[/tex]