GOAL: I understand the difference between positive , negative, zero, and undefined slope. I can calculate the slope of a line given two (X, Y) points on the line. 
Learning Standards 
Common Core Standard: 8.EE.5 
Resources 


GREEN BOOK Reference:
Pages: 387 ─ 389
Practice on pages 390391,
#5  23 odds. 
RED BOOK Reference: Pages: 256 ─ 259
Practice on pages 359360,
#5  29 odds. 
BLACK BOOK Reference:
Pages: 292 ─ 295
Practice on pages 296297,
#1125, and 3337 odds. 
Lesson Vocabulary 

Slope 
A measure of steepness. In math we study Slope as it applies to a line or line graph. In the real world, we use Slope as it applies to surfaces. Some examples include the Slope (pitch) of a roof; the Slope of a ramp for wheelchair access; the Slope of a road surface (like in mountainous areas); the takeoff and landing angle of a plane. 

Strategies and Content Practice 
Begin (prepare) 
Can you identify positive, negative, zero, and undefined slopes? What makes a slope positive, negative, zero, or undefined? 
Engage 
Discuss applications of slope. Relate slope to real life concepts such as biking or skating uphill or downhill. Relate slope to downhill skiing.
Model finding slope from a graph. Work example problems in practice handout.
Model calculating slope from two points. Work example problems in practice handout. 
Assess (formative) 
After example problems and videos, try to solve the Practice Worksheets above. The answers to the practices are on the last page so students can check how well they are doing.
Please see me for more help if you are having difficulty with the practices. 
