QUESTION 1 Below is some of the regression output from a simple regression of the gas mileage (expressed in miles per gallon) (MPG) an automobile gets and the size of the car's engine (expressed in...

Below is some of the regression output from a simple regression of the gas mileage (expressed in miles per gallon) (MPG) an automobile gets and the size of the car's engine (expressed in cubic liters)

SUMMARY OUTPUT

(engine size and MPG)

Regression Statistics
Multiple R
R Square
Adjusted R Square
Standard Error
Observations	9
ANOVA
	df	SS	MS	F	Significance F
Regression		76.9	76.9	26.96	0.001263155
Residual		20.0	2.9
Total
	Coefficients	Standard Error	t Stat	P-value	Lower 95%	Upper 95%
Intercept	37.7	2.493	15.13	1.324E-06	31.83	43.62
Engine Size	-4.73	0.911		0.001

Based on the regression output, what is R² (or coefficient of determination)? (please express your answer using 2 decimal places)