Fifty different companies are competing for a bid with WYDOT to build roads. Each company submitted a sample of their asphalt for WYDOT to test. The plot below shows the relationship between asphalt strength and the asphalt tar concentration from each company. What would be an appropriate conclusion based on this graph (see accompanying document)? Check all that apply (there may be more than one correct answer). Tar causes asphalt to be stronger. There is a correlation between tar concentration and asphalt strength. The more tar that is put into the asphalt the stronger the asphalt will be The stronger the asphalt, the more tar that will be put into it. High levels of tar concentration as associated with stronger asphalt.
