ok so i've been given some isotopes and i'm not sure how to plot them, well i do but i'm kinda confuse .

ok so i've ben given this h(x) = 1/2x + 1

but the main one i'm confuse on its this -3 / 2x - 5 (totally dont get it)

like i know for the first one the vertical asotopes is -1/2 and the second one is 5/2. Cause i know that most of the time u have to draw the isotopes base on a given point. So how do u find that point? thanks!