If all the squared terms in a quadratic function have a negative ...

[DyllonKazuo]

If all the squared terms in a quadratic function have a negative coefficient and there are no cross-product terms, then the function is a _____ function.
 a. convex quadratic
  b. nonlinear objective
  c. concave quadratic
  d. negative elliptical

Question 2

______________ refers to the degree of correlation among independent variables in a regression model.
 a. Multicollinearity b. Tolerance
  c. Rank d. Confidence level

[IAPPLET]

Answer to Question 1

c
RATIONALE: If all the squared terms in a quadratic function have a negative coefficient and there are no cross-product terms, then the function is a concave quadratic function.

Answer to Question 2

a
RATIONALE: Multicollinearity is the degree of correlation among independent variables in a regression model.