need help asap!

Q. Which one is the regression model that involves a single independent variable called?

a. Single regression

b. Simple regression

Q. The purpose of using optimization models for decision-making is to identify

a. the solution that best characterizes the organization

b. the best possible decision

c. how the decision changes due to uncertainly in controllable parameters

d. how the decision changes the optimal solution

Q. A visual tool that can aid in understanding the degree of allowable change in cost coefficients with respect to a linear program optimal solution is

a. histogram

b. pie chart

c. stock chart

d. scatterplot

Q. Which class of problems is a prescriptive modeling approach?

a. portfolio allocation

b. project management

c. regression

d. staffing model