In 2005, Bob's Burgers charged $1.50 for a quarter-pound hamburger with all the fixin's, and sold 7,500 of them. In 2006, although Bob raised the...

In 2005, Bob's Burgers charged $1.50 for a quarter-pound hamburger with all the fixin's, and sold 7,500 of them. In 2006, although Bob raised the price to $1.75, sales of quarter-pound burgers rose to 8,200. Discuss why this does not represent a violation of the law of demand.