Determine whether points A, B, C, and D form a parallelogram or not.

Show work using slopes to justify answer. Graphing alone will not suffice. ( Find four slopes)

A(-1,-2), B(1,3), C(2,0), D(-1,-1)

For 6-9, find the equation of the line (point-slope) containing the two given points:

6. (1,1), (2,1) 7. (-2,1), (2,-2) 8. (1,3), (3,1) 9. (0,0), (1,3)

For 10, find the slope and both intercepts of the line and graph:

10. 2x - y = 4