Which direction would it go in?

slope = (change in y) / (change in x)

In this case... the change in y = -1 the change in x = 5

for the y axis minus is down and plus is up for the x axis minus is left and plus is right

so place one point anywhere on the graph and then go down 1 and right 5 and place a second point on the graph. Draw a line throught the two points.

Extra - it doesn't matter if you start with the x value first or the y value first. You will end up at the same place :-)