The Scatterplot Shown Below Represents a Typical Shape of a Cubic

question 30

Multiple Choice

The scatterplot shown below represents a typical shape of a cubic regression model y = β₀ + β₁x + β₂x² + β₃x³ + ε. Which of the following is true about values of the regression coefficients?

• A) β₁ > 0; β₂ > 0; β₃ > 0
• B) β₁ < 0; β₂ > 0; β₃ > 0
• C) β₁ < 0; β₂ < 0; β₃ > 0
• D) β₁ > 0; β₂ < 0; β₃ > 0