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Examine the rise in gasoline prices from 1997 to 2006. The price of regular unleaded gasoline in January 1997 was $1.26 and in January 2006 the price of regular unleaded gasoline was $2.31 (Bureau of Labor Statistics, 2006). Use the coordinates (1997, 1.26) and (2006, 2.31) to find the slope (or rate of change) between the two points. Describe how you arrived at your answer.

I kno how to put this in a graph to solve but my graph is saying the graph appears to be entered incorrectly. I don't know how to answer this question. As you can see I am not a math person. I need help on this one or show me how to do it and I will plug it into the graph.