Please tell how to write an expression for this

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

The scatter plot graph shows the average annual income for a certain profession based on the number of years of experience which of the following is most likely to be the equation of the trend line for this set of data? a. i=5350e +37100 b. i=5350e-37100 c. i=5350e d. e=5350e+37100

Anyone know? will mark brainliest if you're correct!