A new, streamlined version of Intervention Central is coming in December 2023. The new site will eliminate user login accounts. If you have a login account, be sure to download and save any documents of importance from that account, as they will be erased when the website is revised.
When given a graph, ordered pairs or equations, Christian will determine the slope 8 out of 10 times with 80% accuracy, by September 22, 2015.
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