An equation in point-slope form looks like this:
y-y sub1 = m(x - x sub1) Sorry but I don't know how to find the icon that will change this to sub notation.
Anyway, sub in what you have been given: point j(4,2) with slope of 3
y - 2 = 3 (x - 4)
That's it. You have an equation in point slope form.