The slope of a line parallel to the vertical axis is:

A decrease in the price of a good will cause a leftward shift of the demand curve, if it is a normal good

a. True b. False

If you were to face a marginal tax rate of 20 percent, how much would your tax bill increase when your income increased from $50,000 to $52,000?

A) $1,000 B) $400 C) $450 D) $10,400