Write an equation for the line that passes through (0, -9) and (3, 0). a. y = 3x + 9 b. y = -9x + 3 c. y = 3x + 3 d. y = 3x - 9

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?