Why is an assist called a 'dime' in basketball?

Why is an assist called a 'dime' in basketball?

The most logical explanation comes from the '60s phrase "to drop a dime," which the Dictionary of American Slang ( HarperCollins) defines as "to give information, especially to the police." Most pay phones used to cost a dime; an informant would "drop a dime" to call police and thus "assist" in an arrest.