Least Squares Regression Line

The following table shows the advertised horsepower ratings X and the expected gas mileage Y (in miles per gallon) for a sample of 2012 vehicles:

 

Vehicle	Horsepower	Mileage
Audi A6	292	33
Chevy Malibu	246	26
Dodge Avenger	287	26
Ford Fusion	264	32
Nissan Altima	184	28
Toyota Camry	180	29
Kia Optima	198	27
Honda Civic	243	31

From the data, we calculate X Mean= 236.75, Y Mean= 29.63, sx= 44.64, sy = 2.5 and r = 0.6624.

 

(a) We would like to use the horsepower of a vehicle to explain its mileage. What is the equation of the least squares regression line?

I thought it was 
Y=23.81236516+0.024572903(X)