What is the equation of the line that passes through the point (1,7) and has a slope of −1?

Ibelieve it's a. 2.2 - x = -10.85 (plz tell me if it's right : ) )

(m+11n)^2=(m+11n)(m+11n)=m^2+11mn+11mn+121n^2=m^2+22mn×121n^2 for example; use foil: (a+b)(a+b)first. a^2outside. abinside. ablast. b^2