Answer:
y - 3 = -1/2(x - 1)
Explanation:
Hey there!
Well point slope form is,

We can use the point (1,3)
y - 3 = m(x - 1)
Now we need to find slope with the following formula,
, we’ll use the points (1,3) and (5,1).

-2/4
Slope or m = -1/2
y - 3 = -1/2(x - 1)
Hope this helps :)