What is the slope of the line that passes through the points (10, 8)(10,8) and (-15, 18) ?(−15,18)

(10, 8)      ( -15 , 18)

Slope   =     ( subtract  y coordinates in some order)  /  ( subtract x coordinates in the  same order ) =

So....

( 18 - 8 )   /  ( -15 -10)  =  

10 /  -25   =

-2 / 5