HELP What is a control group?
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What is a control group?

A group that changes the variable

The group that applies the variable

The group that tests the variable

A test group where the variable is not changed or applied

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation,and the determine the cost if he drove it70 miles.b) what would be the cost of a car rental if the car was driven 250 miles? show work