Answer:
To find the slope of the two points you need to use the formula y2-y1/x2-x1
(3,4)(3,-5)
y2=-5, y1=4
x2=3, x1=3
-5-4/3-3
(-5-4=-9) (3-3=0)
-9/0= 0
Your case is special here, which means that your line is perfectly vertical so your slope is 0
Your equation for your line would be x=3, because both of your x values are 3
Hope this helps ;)
Explanation: