Explain the difference between a data table and a graph. When do you use a data table?
When do you use a graph?
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A data table is a visual instrument comprised of labeled columns and rows, while a graph is a diagram showing the relation between variable quantities, typically of two variables, each measured along one of a pair of axes at right angles.

They are used for different purposes, depending on the problem

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project