Answer:
your question seems incomplete (you probably have two points for the line h)
Explanation:
the slope of a line is y=mx+b
given the two points we can compute the slope
let's find the slope first (which is m)
slope=rise/run which is also m=(y2-y1)/(x2-x1)
then you substitute to find b using y=mx+b (we determined m using the slope equation).