4. Graph *y* = *x* - 3

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

Plot the points

Note that the number term, -3 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.