To graph a slope and the points, you first have to find the 9 in the y-axis, and you mark a dot on it (if you want).
Then on that point, you go up one unit in the graph, then go 9 units right. Continue, until it reaches the end of the graph.
And, you do the opposite way. Go to the y-intercept, then go 1 unit down, and 9 units left.
And that’s how you graph it. Hope it helps :)