Use the domain {-3, -2, -1, 0, 1} and plot the points on the graph that would best satisfy the equation. the bold grid marks represent one unit, the horizontal red line represents the x-axis, and the vertical red line represents the y-axis. y = 2-x

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?