Changes

==Useful websites==

==Useful websites==

[[http://www.virtualnerd.com/algebra-1/linear-equation-analysis/slope-rate-of-change/understanding-slope/negative-slope-definition]]

[http://www.virtualnerd.com/algebra-1/linear-equation-analysis/slope-rate-of-change/understanding-slope/negative-slope-definition For more video lessons on Slope click]

==Reference Books==

==Reference Books==