What is the equation of a line that contains the point (2,1) and is parallel to the line: y = 3x – 4?

Hello: 
 an equation   for the line is : y =mx +b    (m: is a slope )

parallel to the line   or the form y = 3x- 4       ( same slope    m  = 3)
the equation is : y = 3x+b

through the point (2,1) : 1 =3(2)+b b=-5
the equation is : y = 3x -5

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743