You find the Y-Intercept by looking on the graph and finding where the line crosses the Y axis. You find the Slope by picking 2 point on the graph that the line intercepts and count how many up and how many over it is to each other, so it is basically Rise/Run. If you have to go down or to the left, it is a negative slope. If you have to go up or to the right, it is a positive slope.
oyo archer comes here in answer your real answer it is 7 divided by 7 divided / 2 / to the answer X to other words if you're into Google with answers in churches of students