Question

conducting lab & field investigations: engineering design
20 of 20
which type of investigation would be best to determine how to decrease exhaust from a gasoline engine?
○ experimental investigation
○ descriptive investigation
○ comparative investigation

Explanation:

An experimental investigation allows for the manipulation of variables to test a hypothesis. To find out how to decrease exhaust from a gasoline engine, variables like fuel - type, engine design elements etc. can be manipulated and tested. A descriptive investigation just records data without manipulation and a comparative investigation compares different pre - existing conditions or samples.

Answer:

Experimental investigation