What is the intercept of the line?

·         The equation of a line is the following:  y = 2 + 0.28x₁ + 43.8x₂. 

·         What is the intercept of the line?

·         Is this equation a straight or curvilinear line, and why?

·         Is this the equation for a simple linear equation or a multiple linear equation?

·         What are the two regression coefficients?

·         If the statistical t-value for the second regression coefficient is 9.80, is the coefficient statistically valid at the 95% confidence level? Why or why not?