Use the following to answer these question.

Independant Variables	Coefficient	Standard Error	t-Statistic
Points per game	0.0315	0.0010
Points surrendered per game	-0.0311	0.0011
Constant	0.4712	0.0553
Observations: 220
Total sum of squares	5.56520
Residual sum of squares	0.95645

Dependent Variable: Team Winning Percentage from WNBA (1997-2013)

a) Interpret slope coefficients

b) Which variables are at least 95% certain that the coefficient is different than zero? Explain the reasoning behind your answer

c) Which variables are not at least 95% certain that the coefficient is different than zero? Explain the reasoning behind your answer.

d) Calculate R ² and explain your answer.