Hey there!
To solve this you must use your slope formula which is y2-y1/x2-x1.
Now, plug in your coordinate point values in place of x and y：
8-6/0-(-4)
Now simplify the expression and if necessary, simplify your slope into simplest fraction form :
8-6/0-(-4)
2/4
2/4=1/2
Therefore, your final answer would be that the slope of this line is 1/2.
Hope this helps!