Practice make perfect!!!!!

try this exercise on your own:

click here: Exercise 1

do here: Exercise 2

1a.  (3, 5) and (-1, -8)
(answer/discussion to 1a)

1b.  (4, 2) and (4, -2)
(answer/discussion to 1b)

2a. 
(answer/discussion to 2a)

2b.  x = -2
(answer/discussion to 2b)

2c.    y = -1
(answer/discussion to 2c)

3a.    and 
(answer/discussion to 3a)

3b.    and 
(answer/discussion to 3b)

4

(answer/discussion to 4a)
    
credit to :
http://www.wtamu.edu/academic/anns/mps/math/mathlab/int_algebra/int_alg_tut15_slope.htm
http://www.mathtutor.ac.uk