Becca M. answered • 04/25/13

Math with Becca - Energetic Tutor Specializing in Math

Hi Clara,

You are asking how to label the points where the line crosses the axis, is that correct?

Like Andy answered you, your slope is -1, (or -1/1, rise over run) and your y-intercept is -4 (since y = mx + b).

Since you know that you have a point at (0,-4), you can then use your slope, -1, to find another point on your line for this equation. From the point (0,-4), you would move down one unit ( -1 "rise") and to the right 1 unit (positive 1 "run"), placing your next point at (1,-5). You mark both of these points with a very small circle or "dot" and connect the lines with a ruler, putting an arrow on each end since it goes on forever.

If this doesn't answer your question, please let me know and I will clarify!

Hope this helps!