How do you determine whether two interval variables have a positive linear relationship?

A) Most of the points fall close to a straight line with positive slope.
B) As the X variable increases,the Y variable increases in a linear way.
C) The scatter diagram shows a linear pattern that is going uphill.
D) All of these choices are true.

An investor bought an 8 ½% bond at 98. The bond would mature in 4 years. Compute the rate of yield to maturity. (Do not consider commission. Round answer to two decimal places.)