Someone help me please. I need to quick!

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

Icould really use some with this question.

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )