Help with this please

Acircle has the equation (x-2)^2 +y^2 =5. what are the coordinates of the circle's center?

Lindsay used two points, (x, y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

Aline passes through 3,7 and 6,9 what equation represents the line