Explanation:
The trick to drawing a usable graph of this relation is to figure what values of x and y may be of interest. When there is no context for the graph, it is often useful to show the x- and y-intercepts. Each can be found by setting the other variable to 0.
x-intercept = -1600/7 = -228 4/7
y-intercept = -1600/-400 = 4
The slope is 7/400, so the graph is nearly flat when x- and y- axis scaling is the same.
________________________________
You can draw the graph yourself using any of the various graphing utilities available, either on the web or as apps for your computing platform. My favorite is the one I used here: Desmos. It is especially nice on a touch-screen, as you can manipulate the scaling easily with your fingers.
________________________________
