a regression is stated as Y=$1450 +$72(X), which of the following describes the slope of the relationship? a. when independent variable increases by one unit, the dependent variable increases by $72 b. when the dependent variable increases by one unit, the independent variable increases by $72 c. when the dependent variable increases by one unit, the indpeendent variable increases by $1450 d. when the independent variable increases by $1450, the dependent varaible changes by 72 e. when the dependent varaible increases by one unit, the indepent variable increases by $1450