Answer: See below for the graph
The graph is a straight line through (0,-8) and (1,-3)
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Further explanation:
You have the correct y intercept. This is where the graph crosses the y axis.
From this starting point, move up 5 units and to the right 1 unit. This motion of "up 5, right 1" is directly from the slope of 5 aka 5/1
slope = rise/run = 5/1
rise = 5 = how far you go up
run = 1 = how far you move to the right
So if we started at (0,-8) and moved up 5, right 1, then we would arrive at (1,-3)
Once these two points are plotted together, we can draw a straight line through them as you see below. I used GeoGebra to make the graph, but you could use Desmos (or similar) if you prefer.