4. Graph y = x - 3

 

Make up a table of x's and y's.

 

 

Plot the points

 

 

Note that the number term, -2 tells us where the line crosses the y-axis. The coefficient of the x, 1 tells us that every time we go one unit to the right, we go up one unit. As a result, the ratio of the rise to the run is 1.